Question

QUESTION 2 A piston-cylinder device contains 5 kg of saturated water liquid at 0.3 MPa. Heat is transferred at constant pressure until the temperature reaches 500 °C. (84 marks) What is the initial temperature of the system? b) What is the initial quality x? c) What is the initial specific enthalpy of the system? d) What is the final state? e) Show the process on a P-v diagram with respect to the saturation line. 1) What is the final specific enthalpy? g) Calculate the change in total volume during the process h) Calculate the total enthalpy increase during the process. Formulae V = V, + X(V, -v) m h = h, + xhe In mixture region, (H=m(h-h) IV=m(V2-v)

Answer 1

امی given - m=5kg P = 0.3m pa we know in Volume Au= m(V2_W) & charge Change in enthalpy AH = mchahil Now a) the intial state is Saturated liquid state so Ti= Put ²0.30 Pa 133.52°C - b) intial quality X=0 () intial specific enthalpy hi ha lat 0.3 mfa) hi 561.43 kJ/kg 10) P = 0.3mpa Te = swoc e) To-Sooc P X 0.3mpa 2 T-sw°c ou here u 0.001073 d) lince Tay That 10.3m Pal, do Hrad atate is super heated state H from superteated tables. h2 = 3486.6 kJ/kg-11) Vt 10.3mpal milleg V2 = [0.3m pa, Sw°C) = 1.18612 milly g) change in total volume elurly the process Av: m [MVJE 5 (1-8672 -0.001073) 5.928 ms total enthalpy increall during the process AH= m(haahi) put the value of mine, ha AH: 5(3486-6-561-43) tom et lib.17) W) 44 14626 kolleg b hope it will help you Happy Clegging