Physics 0625 · IGCSE · Kinetic particle model of matter
Kinetic particle model of matter — practice question
Fig. 4.1 depicts a bottle that is partly filled with water. The air trapped in the bottle is at the same pressure as the surrounding air outside it. Both the bottle and its contents are at room temperature. The diagram labels bottle, air and water.
(a(i))[3]
Explain, in terms of particles, how the air pressure inside the bottle changes as the temperature goes up.
(a(ii))[2]
State and explain how the air pressure inside the bottle changes.
(b)[2]
Calculate the thermal energy needed to raise the temperature of the water by $20\,^{\circ}\text{C}$.
(c)[2]
Calculate the pressure difference between the top and the bottom of the water.
Worked solution & mark scheme
This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Increase in average KE/speed of air particles” …