Physics 9702: IDEAL GASES Topical Past Paper Questions

(a) State the first law of thermodynamics. [2] (b) A sample of an ideal gas contains $ 3.58 \times 10^{24} $ molecules. The sample is at a temperature of 298K and a pressure of $ 1.84 \times 10^{5} $ Pa. (i) Show that the volume of the gas is $ 0.0800 \, m^{3} $. [2] (ii) Calcula…

(a) With reference to molecular kinetic energy and molecular potential energy, explain what is meant by the internal energy of an ideal gas. [2] (b) A sample of an ideal gas is initially in state A, at a pressure of $ 2.0 \times 10^{5} $ Pa and with a volume of $ 0.016 \, m^{3} $…

(a) (i) State what is meant by the Avogadro constant. [1] (ii) State the relationship between the Avogadro constant $ N_{A} $, the molar gas constant R and the Boltzmann constant k. [1] [1] (b) Two samples X and Y of ideal gases are both at thermodynamic temperature T. Sample X h…