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Listening Quiz: Khởi Động Lò Phản Ứng Xúc Tác Mới – Advanced Level
Th5 4, 2025
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bởi
Anna Phạm
trong
Tiếng Anh Hóa Học (English for Chemistry)
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1.
What is the first step in starting the catalyst activation?
Introduce hydrogen gas at 5 bars
Heat the reactor slowly to 200 degrees Celsius
Check the reaction rate and temperature stability
Cool the reactor to 200 degrees Celsius
Explanation:
Emma says the first step is to heat the reactor slowly to 200 degrees Celsius.
2.
Why do Emma and Mark heat the reactor slowly?
To make the reaction rate higher immediately
To avoid damaging the catalyst structure
To increase the pressure inside the reactor
To prevent oxidation during heating
Explanation:
Emma explains that heating it slowly helps avoid damaging the catalyst structure.
3.
What gas is used during the heating stage?
Oxygen
Nitrogen
Helium
Hydrogen
Explanation:
Emma says they use nitrogen during heating to prevent oxidation.
4.
How long should the reactor be kept at 200 degrees Celsius?
Exactly one hour
About five minutes
About two hours
Until the pressure reaches 5 bars
Explanation:
Emma states that it should be kept at 200 degrees for about two hours to ensure full activation.
5.
What should they do if the reaction rate is low after activation starts?
Lower the pressure below 5 bars
Increase the temperature slightly
Stop using nitrogen immediately
Cool the reactor down quickly
Explanation:
Emma says that if the reaction rate is low, they may need to increase the temperature slightly.
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