Heat and Thermodynamics
GCE Physics

(a) Define the following terms as used in thermodynamics: (i) Internal energy of a gas (ii) Isothermal process (iii) Adiabatic process [6 marks] (b) A fixed mass of an ideal gas occupies a volume of …

(a) (i) State the first law of thermodynamics. (ii) Write the mathematical expression for the first law of thermodynamics and identify each term. [4 marks] (b) A Carnot engine operates between a sour…

A piece of copper of mass 200 g is heated from 30°C to 80°C. If the specific heat capacity of copper is 400 J kg⁻¹ K⁻¹, calculate the quantity of heat absorbed by the copper.

During a change of state from liquid to gas at constant temperature, the heat energy supplied to the substance is used mainly to

A fixed mass of an ideal gas has a volume of 4.0 L at a pressure of 3.0 × 10⁵ Pa and a temperature of 27°C. If the temperature is raised to 127°C while the pressure is kept constant, what is the new v…

Which of the following statements correctly describes the zeroth law of thermodynamics?

An ideal gas undergoes an isothermal compression. Which of the following statements about the internal energy of the gas is correct?

Steam at 100°C is passed into 500 g of water at 20°C until the temperature of the water rises to 40°C. If the specific heat capacity of water is 4 200 J kg⁻¹ K⁻¹ and the specific latent heat of vapori…

A Carnot engine operates between a source temperature of 527°C and a sink temperature of 27°C. What is the efficiency of the engine?

Which of the following correctly explains why a clinical thermometer has a constriction near its bulb?

A thermometer reads 25°C. What is the equivalent temperature on the Kelvin scale?