1.0 kg of water at a temperature of 100 °C has thermal energy supplied to it
PHYSICS · Multi-part · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics
Problem
1.0 kg of water at a temperature of 100 °C has thermal energy supplied to it. All the water changes into steam at the same temperature and at a pressure of 1.01×105 Pa. The steam occupies a volume of 1.67 m3. If the specific latent heat of vaporisation of water is 2.26 MJkg-1, calculate
(1) the thermal energy required.
(2) the work done on its surroundings by the water as it expands.
(3) using the first law of thermodynamics, the change in the internal energy of the water.