Physics 0625 · IGCSE · Kinetic particle model of matter
Kinetic particle model of matter — practice question
A fixed mass of gas is cooled while its volume is kept constant.
(a)[3]
State and explain, in particle terms, how the gas pressure alters.
(b(i))[1]
State the value of absolute zero, in $^{\circ}\text{C}$.
(b(ii))[2]
Explain what the term absolute zero means. Make reference to particles in your response.
(c)[3]
Calculate the volume of cylinder 2.
Worked solution & mark scheme
This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Pressure decreases AND particles have a lower velocity/momentum/kinetic energy” …