Saturated water vapour at 200°c is contained in a cylinder fitted with a piston. the intial volume of the steam is 0.01 m. the steam expands in a quasiequilibrium isothermal process until the final pressure is 200 kpa and in so doing does work against the piston. how much work is done during the process ? how much error would be made by assuming the steam to behave as an ideal gas?

Atank with constant volume contains 2.27 kg of a mixture of water phases (liquid-vapor). in the initial state the temperature and the quality are 127 °c and 0.6, respectively. the mixture is heated until the temperature of 160 oc is reached. illustrate the process in a t-v diagram. then, determine (1) the mass of the vapor in kg at the initial state, (2) the final pressure in kpa.

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?