化学专业专业英语论文
化工专业科技英语作文
化工专业科技英语作文Chemical Engineering and Technology。
Chemical engineering and technology is a branch of engineering that applies physical sciences (e.g., chemistry and physics) and life sciences (e.g., biology, microbiology and biochemistry) together with mathematics and economics to produce, transform, transport, and properly use chemicals, materials and energy. It essentially deals with the design, construction, and operation of machines and plants that perform chemical reactions to solve practical problems or make useful products. It is a multidisciplinary field that involves a wide range of industries, from pharmaceuticals and food to petrochemicals and energy.Chemical engineers are involved in many aspects ofplant design and operation, including safety and hazard assessments, process design and analysis, control engineering, chemical reaction engineering, construction specification, and operating instructions. They are alsoresponsible for the development of new materials and technologies, such as nanotechnology, fuel cells and biomedical engineering. In addition, they play a key rolein environmental protection and the development of sustainable processes and products.Chemical engineering and technology is a rapidly growing field with great potential for future development. As the demand for energy and materials continues to increase, the need for chemical engineers will also grow. In addition, the increasing focus on environmental sustainability and the development of new technologies will create new opportunities for chemical engineers to make a significant impact on society.One of the key challenges facing chemical engineers today is the need to develop sustainable processes and products. With the increasing awareness of environmental issues and the finite nature of natural resources, there is a growing demand for processes and products that minimize waste, reduce energy consumption, and use renewable resources. Chemical engineers are at the forefront of thiseffort, developing new technologies and processes that are more sustainable and environmentally friendly.Another challenge facing chemical engineers is the need to develop new materials and technologies to meet the demands of a rapidly changing world. As new industries and technologies emerge, there is a growing need for new materials and processes that can meet the demands of these industries. Chemical engineers are working to develop new materials and technologies that can meet the needs of these industries, such as advanced materials for electronics, new materials for energy storage, and new processes for the production of biofuels.In conclusion, chemical engineering and technology is a dynamic and rapidly growing field with great potential for future development. Chemical engineers play a key role in the development of new materials and technologies, the design and operation of chemical processes, and the development of sustainable processes and products. With the increasing demand for energy and materials, and the growingfocus on environmental sustainability, the need for chemical engineers will continue to grow in the future.。
化学专业英文作文
化学专业英文作文Studying chemistry is like entering a whole new world. It's all about atoms, molecules, reactions, and the amazing things they can create. It's like magic, but withscientific explanations.Chemistry experiments are both exciting and nerve-wracking. You never know what will happen when you mix different chemicals together. It's a bit like playing with fire, but in a controlled and safe environment.The periodic table is like a map of the chemical world. It's full of elements, each with its own unique properties and behaviors. Learning about each element feels like getting to know a new friend, with its own quirks and characteristics.Lab reports are a big part of studying chemistry.They're like telling a story, but with data and observations instead of characters and plot. It's all aboutdocumenting what happened in an experiment and what it means in the bigger picture of chemistry.Chemistry equations can be intimidating at first, but once you understand the rules, they start to make sense.It's like solving a puzzle, trying to balance the elements on both sides of the equation to make everything work out perfectly.Organic chemistry is like learning a new language. It's full of complex structures and reactions, and it takes time and practice to become fluent in it. But once you do, it opens up a whole new world of possibilities in the field of chemistry.In the end, studying chemistry is all about curiosity and discovery. It's about asking questions, conducting experiments, and uncovering the secrets of the chemical world. It's a journey of constant learning and exploration, and it never fails to amaze and inspire.。
化学专业英语毕业论文
化学专业英语毕业论文关键词：化学工程专业英语教学方法能力培养摘要:在化学工程专业英语的教学中,结合专业英语的特点,改革教学方法,创造良好的环境,充分调动学生的兴趣和主动性,通过实践培养和提高学生用英语获取专业信息和交流的能力。
我国的大学专业英语教学是大学基础英语的后续阶段,其目的是为了帮助学生较快地掌握、运用专业英语,把语言能力同专业知识融为一体。
21世纪是国际化的世纪,如何应对国际化的挑战,培养一大批既具有丰富的专业知识又有很强的英语能力的高水平的创新人才是我们面临的一大挑战。
英语正成为一种真正的世界语,据统计,讲英语、学英语的人多达世界人口的五分之二,世界上有85%的科技资料用英语出版,国际学术会议的工作语言一般都是英语。
本文试从如何激发学生的兴趣,科技英语及化学工程专业英语的特点以及教学方法的改进等方面来谈一谈化学工程专业英语的教学体会。
一、激发学生的兴趣兴趣是最好的老师,是学业成功最重要的心理动力一个人的潜能能否充分发挥出来很大程度上取决于他是否有稳定的兴趣。
学校的课程及各种教学安排要尽可能地激发学生学习的兴趣,养成学习的习惯,熟悉学习的方法。
在给学生用英语讲授第一次课时,笔者试图从五个方面激发学生学好专业英语这门课程的兴趣和紧迫感。
首先,让学生了解中国化学工业和世界化学工业的状况,中国化学工业在深化改革中发展,在困难中前进并取得了显著的成绩,但是与世界发达国家相比还有一定的差距,在技术方面还远远落后于发达国家,需要向他们学习先进的技术和经验。
21世纪的中国化学工业充满希望和机遇,也充满竞争和挑战。
作为未来的化工工程师,为顺应时代发展的潮流,也同样面临着机遇和挑战。
第二,让学生了解化工工程师由于在科学和工程学方面有着广泛的知识和技能背景,可以胜任许多部门的工作。
正因为此,化工工程师的薪水是比较高的,从表1美国1999年各类工程师的年薪可以看到本科毕业的化工工程师的薪水比其他各类本科毕业的工程师的薪水要高。
化学师范专业介绍英语作文
化学师范专业介绍英语作文Title: Introduction to Chemistry Education Major。
Chemistry education is a specialized field that prepares individuals to teach chemistry at various educational levels, ranging from middle school to college. This major equips students with a deep understanding of chemistry concepts and pedagogical techniques necessary for effective teaching. In this essay, we will delve into the components, importance, and career prospects of a chemistry education major.1. Core Curriculum:The curriculum of a chemistry education major typically encompasses a comprehensive study of chemistry alongside courses in education theory and practice. Students undertake foundational courses in general chemistry, organic chemistry, physical chemistry, and analytical chemistry. These courses provide a solid grounding in theprinciples and applications of chemistry, which isessential for effective teaching.Additionally, students engage in education-focused courses that cover topics such as curriculum development, classroom management, educational psychology, and teaching methodologies. These courses are designed to equip future educators with the skills and knowledge needed to create engaging lesson plans, assess student learning, and foster a conducive learning environment.2. Importance:Chemistry education plays a crucial role in cultivating scientific literacy and fostering interest in the natural sciences among students. By imparting knowledge of fundamental chemical concepts and phenomena, chemistry educators help students develop critical thinking skills and scientific inquiry abilities. Moreover, a strong foundation in chemistry is essential for understanding various real-world issues, such as environmental sustainability, energy production, and healthcare.Furthermore, chemistry education contributes to the development of a skilled workforce in science, technology, engineering, and mathematics (STEM) fields. By inspiring students to pursue careers in chemistry and related disciplines, educators play a key role in addressing societal challenges and driving innovation.3. Career Prospects:Graduates of chemistry education programs are well-equipped for a variety of career paths in education and related fields. Many pursue teaching positions at middle schools, high schools, and community colleges, where they educate students on the principles of chemistry and inspire a passion for science.Others may choose to work in informal education settings, such as museums, science centers, or outreach programs, where they engage the public in hands-on science activities and demonstrations. Additionally, some graduates may opt for roles in educational administration, curriculumdevelopment, or science policy, where they can influence educational practices and policies on a broader scale.Overall, a degree in chemistry education opens up diverse career opportunities for individuals passionate about both chemistry and teaching, allowing them to make a meaningful impact on the lives of students and society as a whole.In conclusion, a chemistry education major provides students with the knowledge, skills, and experiences necessary to become effective chemistry educators. By combining a deep understanding of chemistry with pedagogical expertise, graduates of this program play a vital role in promoting scientific literacy, fostering interest in the natural sciences, and preparing the next generation of scientists and innovators.。
关于化学的专业英语小作文
关于化学的专业英语小作文Chemistry is a fascinating science that delves into the composition and properties of matter. It is the study of how elements interact and transform, revealing the secrets of the universe at a molecular level.In the realm of chemistry, the periodic table stands as a testament to the systematic organization of elements. Each element has its unique atomic structure, and understanding these structures is key to predicting reactions and behaviors.Experimentation is at the heart of chemistry. It is through the meticulous design and execution of experimentsthat we uncover new compounds, reactions, and insights intothe world of matter. The lab is a place of discovery, where hypotheses are tested and knowledge is expanded.Chemical reactions are the cornerstone of this science. They can be simple or complex, exothermic or endothermic. The balance of reactants and products, governed by the law of conservation of mass, is a fundamental principle that guides our understanding.Analytical chemistry is the branch that focuses on the detection, identification, and quantification of chemical substances. It plays a crucial role in various industries,from pharmaceuticals to environmental monitoring, ensuring safety and quality.Organic chemistry, a sub-discipline, deals with carbon-containing compounds. The complexity of organic molecules and their vast array of reactions make it a rich field for innovation and the development of new materials and drugs.Biochemistry, another branch, explores the chemical processes within living organisms. It is the intersection of biology and chemistry, where the understanding of enzymes, proteins, and metabolic pathways is crucial for advancements in medicine and nutrition.Chemistry education is vital for nurturing the next generation of scientists. It equips students with the analytical skills and knowledge base necessary to contribute to scientific research and technological innovation.In conclusion, chemistry is an ever-evolving field with applications that touch every aspect of our lives. From the medicines we take to the materials we use, the study of chemistry is integral to the progress of human civilization.。
化工专业英语写作范文
化工专业英语写作范文Title: The Evolution and Importance of Chemical Engineering: A Global Perspective.Chemical engineering, often referred to as the "mother of all engineering disciplines," has played a pivotal role in the advancement of technology and industrialization. Its impact is felt across multiple sectors, including energy, healthcare, environmental protection, and more. In this article, we delve into the evolution of chemical engineering, its current significance, and its future prospects.Evolution of Chemical Engineering.The roots of chemical engineering can be traced back to the Industrial Revolution, when the need for efficient and sustainable production methods arose. Initially, the field was primarily focused on the optimization of processes in the chemical industry, such as the production offertilizers and dyes. However, as technology advanced, the scope of chemical engineering broadened to include areas like biochemistry, environmental engineering, and nanotechnology.One of the most significant milestones in the evolution of chemical engineering was the development of the principles of reaction engineering in the early 20th century. This marked a shift from a reliance on empirical methods to a more rigorous and systematic approach, based on the principles of physics and chemistry. This development laid the foundation for the design and optimization of chemical reactors, which are crucial in the production of various chemicals.Another key development was the integration of computers into chemical engineering in the later part of the 20th century. This integration enabled engineers to model and simulate complex chemical processes, thus predicting their behavior more accurately. Computer-aided design (CAD) and computer-aided manufacturing (CAM) tools also revolutionized the design and fabrication of chemicalplants, making the process more efficient and cost-effective.Current Significance of Chemical Engineering.Today, chemical engineering is at the forefront of addressing many of the world's most pressing challenges. For instance, it plays a crucial role in the development of sustainable energy solutions. Chemical engineers are involved in the research and development of efficient solar cells, batteries, and fuel cells, as well as in the optimization of biofuel production processes.In healthcare, chemical engineering has madesignificant contributions to the development of drugs and therapies. By manipulating molecules at the nanoscale, engineers are able to create targeted drugs that are more effective and have fewer side effects. They are also involved in the design of medical devices and the optimization of bioprocessing techniques for tissue engineering and regenerative medicine.Moreover, chemical engineering is essential in addressing environmental challenges. Engineers are working to develop more efficient waste treatment and recycling methods, as well as to mitigate the impact of industrial processes on the environment. They are also involved in the research and development of sustainable materials that can replace traditional, environmentally harmful ones.Future Prospects of Chemical Engineering.The future of chemical engineering looks bright, with numerous opportunities for innovation and growth. One area that is expected to witness significant advancements is biotechnology. With the advent of synthetic biology and genome editing tools like CRISPR-Cas9, chemical engineers will be able to design and engineer cells and organisms with enhanced functionalities. This could lead to the development of novel bioproducts, such as bioplastics and biofuels, that are more sustainable and environmentally friendly.Another area of potential growth is nanotechnology.Chemical engineers are exploring the use of nanomaterialsin various applications, including drug delivery, energy storage, and environmental remediation. The uniqueproperties of nanomaterials, such as their large surface area and enhanced reactivity, make them ideal foraddressing many of the challenges faced by the chemical industry.Lastly, the integration of digital technologies, suchas artificial intelligence (AI) and the Internet of Things (IoT), is expected to transform chemical engineering. These technologies can be used to optimize processes in real-time, predict and prevent failures, and improve safety and sustainability. By leveraging the power of data analytics and predictive modeling, chemical engineers will be able to make more informed decisions and develop more efficient and cost-effective processes.In conclusion, chemical engineering has come a long way since its inception and continues to play a pivotal role in addressing the world's most pressing challenges. As we look to the future, it is exciting to imagine the innovativesolutions that chemical engineers will develop and the impact they will have on society.。
有关化学专业的英语作文
有关化学专业的英语作文Studying chemistry is such a fascinating journey! I'm always amazed by how tiny molecules come together to create incredible reactions. In the lab, every experiment feels like a little adventure. You never know what's gonna happen until you mix those chemicals and watch the magic unfold.One of my favorite things about chemistry is how it's applicable in so many fields. From medicine to engineering, chemistry is the foundation of so many amazing discoveries. It's like a gateway to understanding the world at a microscopic level.But let's not forget the challenges. Chemistry can be tough! There are so many formulas, reactions, and mechanisms to memorize. But that's what makes it exciting too. Solving a tough chemistry problem feels like cracking a code, and when you finally get it, the sense of accomplishment is incredible.In class, we often have group discussions where we share our ideas and experiment results. Those moments are so valuable because you learn so much from your peers. Everyone has a different perspective, and it really broadens your understanding of the subject.I also love how chemistry encourages creativity. Sometimes, you have to think outside the box to find a solution to a.。
介绍化工专业的认识英文作文
介绍化工专业的认识英文作文Understanding the Chemical Engineering Profession1. The Role of Chemical Engineers2. Core Areas of StudyThe foundation of chemical engineering lies in several core areas of study:Chemistry: A deep understanding of chemistry is essential for chemical engineers. They study chemical reactions, material properties, and reaction kinetics to develop and optimize chemical processes.Thermodynamics: Chemical engineers use thermodynamic principles to understand and predict the behavior of materials and energy during chemical processes. This knowledge is crucial for designing efficient systems and optimizing energy usage.Fluid Mechanics: This area focuses on the behavior of fluids in motion and at rest. Chemical engineers apply fluid mechanics principles to design and operate equipment such as pumps, reactors, and separation units.Heat and Mass Transfer: Understanding how heat and mass are transferred within chemical processes is vital for designing efficient systems. This includes studying heatexchangers, distillation columns, and other separation technologies.Process Control: Chemical engineers utilize processcontrol techniques to monitor and regulate chemical processes, ensuring they operate within desired parameters and maintain product quality.3. Practical ApplicationsChemical engineering is instrumental in numerouspractical applications that impact daily life and industry: Energy Production: In the energy sector, chemical engineers work on optimizing processes for extracting, refining, and utilizing energy sources, including fossil fuels, biofuels, and renewable energy.Environmental Protection: Chemical engineers contributeto environmental sustainability developing technologies for waste treatment, pollution control, and resource recovery. They work on projects aimed at reducing the environmental impact of industrial activities.Food and Beverage Industry: Chemical engineers design and optimize processes for food and beverage production, focusing on improving quality, safety, and efficiency in manufacturing.4. Challenges and InnovationsChemical engineering faces several challenges thatrequire innovative solutions:Sustainability: Chemical engineers are increasingly focused on developing sustainable processes and technologies that minimize environmental impact and promote the use of renewable resources.Safety: Ensuring safety in chemical processes is paramount. Chemical engineers must address potential hazards, implement safety protocols, and design systems that prevent accidents and protect workers and the environment.5. Future ProspectsConclusion。
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Synthesis of Benzoic Acid
湛江师范学院 11化本2班 2011xxxx
1. Objectives
(1) Learn the principle and methods of preparing benzoic acid by oxidative reaction.
(2) Master the purification technique of recrystallization.
2. principle
3. Reagents Toluene 2.7ml (0.025mol);KMnO 4 8.5g; concentrated hydrochloric acid.
4. Procedure
(1) Place 100ml of water,4.5g of pure potassium permanganate and 2.7ml of toluene in a 250ml three-necked flask equipped with a sealed mechanical stirrer and reflux condenser (see Figure1-8). Stir the mixture and reflux gently until practically all the permanganate color has disappeared (about 2 hours).At this point add 4g more of potassium permanganate and reflux the mixture again until the permanganate color disappears (about 2 hours); the color of the solution can easily be seen by removing the flame and stopping the refluxing.The end of oxidation is also judged by disappearance of the permanganate of the oily toluene in the refluxing liquid.
(2) Filter the hot contents of the flask from the manganese dioxide with suction.
Wash the manganese dioxide with two 12ml portions of hot water.Cool combined solution.If the color of the filtrate is purple,add a small amount of of NaHSO 3 solution and re-filter.
(3) Precipitate all the benzoic acid by cautiously adding 10ml of concentrated
hydrochloric acid with continul strring. When cold, filter with suction,wash the acid with cold water and dry at 80℃.Upon recrystallization from hot water, the m.p. is raised to 120—122℃.
5. Data recording and processing
n: 0.025mol 0.025mol
m: 0.025×122.12g
The actual yield Ma=1.2g
The theoretical yield Mt=3.053g
CH 34MnO 2 + KOH + H 2O ++2Cl COOH
KCl ++
1.2g
W= ×100％=39.31％
3.053g
6.Notes:
(1)A somewhat lower yield is obtain is obtained if all the potassium permanganate is added all at once and,furthermore,the reaction may become violent.A ddition in 2～3portions results in a more controllable reaction.
(2)If the concentrated solution is not clear, it may be clarifid by the addition of 1g of activated charcoal.
7.Questions
(1).What are the primary factors influenced the yield of benzoic acid in the process of oxidative reaction ?
Answer:Organic reaction by-products of more,the by-product will influence,and the amount of reactants will also affect the yield As well as the reaction conditions affect.。