Physics · Oct / Nov 2025 · Paper 11 · Question 15

A student investigates how changing the temperature of a gas affects the volume of the gas. The gas is kept at a constant pressure. Which graph shows the relationship between the temperature and the volume of a sample of gas at constant pressure?

1. Avolume-temperature graph showing a straight line with positive gradient starting above the origin
2. Bvolume-temperature graph showing a curve decreasing from a high value
3. Cvolume-temperature graph showing a straight line with negative gradient
4. Dvolume-temperature graph showing a horizontal line

As printed in the paper