One kilogram of water in a frictionless piston-cylinder assembly undergoes an internally reversible, isentropic transformation from t_1 = 10 degree c, p_1 = 0.1mpa to t_2 = 90 degree c, and p_2 = 0.5 mpa. consider water as incompressible substance with constant specific heat, c = 4.211 kj/kg. k. assume that no phase transitions occur. determine: the heat transfer and the work for the process; the total entropy variation and entropy generation during the process.