any help would be great this is for my thermodynamics class
any help would be great this is for my thermodynamics class and the answer is on the bottom right. if you could show work please to help better understand
Solution
P = P1 = P2 = 7 bar
x1 = 0.9
T2 = 200 deg. C
u = Q - W
W = pdv
W = p (v2-v1)
v1 = v(p,x1)
v2 = v(p,T2)
W = 7*10^5 [N/m^2] *(0.299-0.2455) [m^3/kg]
W = 37.45 kJ/kg
u = u2 - u1 = u(p,T2) - u(p,x1)
u = 2634.2818 - 2383.6216
u = 250.6602 kJ/kg
Q = u + W
Q = 288.1102 kJ/kg
