1. Argon is compressed from standard conditions up to a pressure of 5 bar. Assume polytropic compression and calculate the compression work per unit of mass. Do the same calculation for isothermal process. Explain the difference. Argon is assumed to be an ideal gas.
2. Water is heated from 50 to 90°C. Determine the amount of heat required to do this for 10 kg of water. Determine the relative increase in water volume.