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Question 23M.1A.SL.TZ2.9

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.1A.SL.TZ2.9
Level SL Paper 1A Time zone TZ2
Command term Question number 9 Adapted from N/A
9.
[Maximum mark: 1]
23M.1A.SL.TZ2.9

A fixed mass of an ideal gas expands slowly at constant temperature in a container.

Three statements about the gas molecules during the expansion are:

I.    They collide with the walls of the container at a reduced rate.
II.   They travel further on average between each collision.
III.  Their average kinetic energy decreases as the gas expands.

Which statements are correct?


A.  I and II only

B.  I and III only

C.  II and III only

D.  I, II and III

[1]

Markscheme

A

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