Санкт-петербургского государственного университета высшее профессиональное образование т. А. Степанова, И. Ю. Ступина
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| Section III
Ex. 1. Respond to the following statements. Use the expressions: quite so; I'm o f the same opinion; really; it is not quite so; you are absolutely wrong. 1. It is sometimes difficult to make the reaction procccd faster. 2. There is a tremendous number of factors affccting the reaction. 3. Catalysts are important only in chcmical industry. 4. I hear your supervisor has been awarded the State prize for his work. 5. They say you never attend lectures in history. 6. Borodin was not only a chemist 147 but an outstanding Russian composcr as well. 7. Prof. N has been appointed head of your laboratory, hasn’t he? Ex. 2. Translate the sentences into English. 1. Говорят, вы уже на втором курсе? — Не совсем так, я еще на первом. 2. Наш лектор — замечательный ученый. — Действительно. 3. Катализатор влияет на реакцию, но и сам изменяется. — Вы абсо лютно неправы, в конце реакции катализатор должен восстанавливаться в первоначальном виде. 4. Катализаторы могут участвовать и в биоло гических процессах.— Совершенно верно. 5. Катализаторы более важ ны в промышленности, чем в лаборатории. — Я того же мнения. Ex. 3. Make up short dialogues according to the model. Model: — A statement. — A question. — An answer. — A statement. Example: — My supervisor has published a new articlc. — What is the subject of his investigation? — Ion-selective electrodes. — It’s a very promising field. Ex. 4. Give detailed answers to the following questions: 1. What is the rate o f a reaction? 2. What chemical factors afreet the course of a reaction? 3. What physical factors influence the speed of a reaction? 4. What is catalysis? 5. In what way docs the presence of a catalyst affect the reaction rate? Ex. 5. Discuss the following topics: 1. Some Examples o f Slow and Fast Reactions. 2. Factors Influencing the Rate of Reactions. 3. Catalysis. WHAT IS IT? A substancc which can increase the rate o f a chcmical reaction without itself undergoing permanent chcmical change. - жүктеу/скачать 5,96 Mb. Достарыңызбен бөлісу:
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