Determine the change in specific entropy, s2 - s, in kJ/(kgK), between states 1 and 2 for the fluids and states given below. (You do not need to include given,

find, system diagrams, assumptions, and basic equations for these problems.) (a) Water:State 1: T = 320 °C, P, = 5.0 bar,State 2: T2 = 70 °C, x2 = 0.8 (b) R134a:State 1: T = 20 °C, P = 2.0 bar,State 2: T2 = 0°C, P2 = 3.0 bar (c) CO2:State 1: T, = 10 °C, P = 20.0 bar,State 2: T, = -20 °C, P, =20.0 bar (d) Ammonia:State 1: T, = -10 °C, x = 0.0,State 2: T, = 0 °C, P, = 1.0 bar