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Listening Quiz: Kiểm Soát Khối Lượng Phân Tử Trong Lò Phản Ứng Polymer Hóa – Medium Level
Th4 1, 2024
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bởi
Anna Phạm
trong
Tiếng Anh Hóa Học (English for Chemistry)
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1.
What is the main topic of Robert and Mia’s conversation?
Controlling molecular weight in a polymerisation reactor
Testing the color of a liquid mixture
Choosing packaging materials for a product
Designing a new marketing campaign
Explanation:
They discuss reactor design, molecular weight distribution, reactor type, temperature, monomer concentration, and polymer chain length, all related to controlling molecular weight in polymerisation.
2.
According to Robert, why is controlling molecular weight important?
It increases the amount of monomer used
It affects the polymer’s strength and flexibility
It makes the reactor easier to clean
It changes the color of the polymer
Explanation:
Robert says controlling molecular weight is important because it affects the polymer’s strength and flexibility.
3.
What type of reactor does Robert suggest?
A distillation column
A batch reactor
A tubular furnace
A continuous stirred tank reactor
Explanation:
Robert specifically suggests a continuous stirred tank reactor.
4.
What does Robert say helps with molecular weight control in the suggested reactor?
It lowers the amount of initiator
It stops the polymer from forming chains
It changes the polymer’s color
It keeps the reaction conditions uniform
Explanation:
Robert explains that a continuous stirred tank reactor helps because it keeps the reaction conditions uniform.
5.
What can be inferred about temperature and monomer concentration in the reaction?
They only matter after the reaction is finished
They replace the need for reaction time
They can be adjusted to help achieve desired results
They are irrelevant once the reactor starts running
Explanation:
Robert says temperature and monomer concentration matter, and that they can be controlled to get desired results, so it can be inferred they are adjustable factors used to influence the reaction.
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