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Exercises

Exercise

Due to the existence of an activation energy, most reactions proceed ...

Please make a choice.

Please make a choice.

correct

wrong

partly correct

This is the right answer

... less rapid with increasing temperature.

Sorry, that is wrong.

... more rapid with falling temperature.

No, sorry.

... more rapid with falling pressure.

Sorry, that is not correct.

... more rapid with increasing temperature.

Yes, that is correct.

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Exercise

A general rule is: If the temperature is increased by 10 °C, the reaction rate is approximately ...

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Please make a choice.

correct

wrong

partly correct

This is the right answer

... halved.

No, sorry.

... quadrupled.

Sorry, that is wrong.

... redoubled.

That is correct!.

... increased tenfold.

Sorry, that is not correct.

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Exercise

At higher temperature, the number of collisions that ...

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Please make a choice.

correct

wrong

partly correct

This is the right answer

... lead to a successful conquest of the activation energy barrier is lower.

No, sorry.

... do not lead to a successful conquest of the activation energy barrier is higher.

Sorry, that is wrong.

... lead to a successful conquest of the activation energy barrier does not change.

No, sorry.

... lead to a successful conquest of the activation energy barrier is higher.

Correct!

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Exercise

Another general rule is that a reaction proceeds noticeably at room temperature when its activation energy Ea is smaller than ...

Please make a choice.

Please make a choice.

correct

wrong

partly correct

This is the right answer

... 95 kJ/mol.

Sorry, that is wrong.

... 105 kJ/mol.

No, sorry.

... 115 kJ/mol.

Sorry, that is not correct.

... 85 kJ/mol.

Correct!

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