Question

Water in a 6-ft3 closed, rigid tank is at 200 F, 90% quality. The tank is then cooled to 20 F. Calculate the heat transfer during the process.

Answer 1

C.V.: Water in tank.

m2 = m1 ; m(u2 - u1) = 1Q2 - 1W2

Process: V = constant, v2 = v1, 1W2 = 0