DP Physics (last assessment 2024)

Question 21M.2.SL.TZ2.2a

Date	May 2021	Marks available	[Maximum mark: 2]	Reference code	21M.2.SL.TZ2.2a
Level	SL	Paper	2	Time zone	TZ2
Command term	Deduce	Question number	a	Adapted from	N/A

[Maximum mark: 2]

21M.2.SL.TZ2.2a

The graph shows the variation with temperature T of the pressure P of a fixed mass of helium gas trapped in a container with a fixed volume of 1.0 × 10⁻³m³.

(a)

Deduce whether helium behaves as an ideal gas over the temperature range 250 K to 500 K.

[2]

Markscheme

«He behaves as ideal gas if» $p \propto T$ «at constant V» ✓

uses two points to show that $p \propto T$ ✓

MP1 can also be described as $\frac{p}{T} = k OR \frac{p}{T} = \frac{n R}{V}$

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Core

Core » Topic 3: Thermal physics » 3.2 – Modelling a gas

Core » Topic 3: Thermal physics

Question 21M.2.SL.TZ2.2a

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