PLEASE HELP ME NOW!! its urgent

Problem 1 (30 points) Steam is expanded in a piston cylinder device from T1 = 400 C and P= 500 kPa to T2 = 300 C and P2 = 200 kPa. If the mass of steam is 4 kg and the heat loss is 5 kJ/kg, determine: (a) The saturation temperature (C) of steam at 200 and 500 kPa. (b) The latent heat of evaporation at 200 kPa (kJ/kg). (e) The change in enthalpy and internal energy during expansion (kJ). (d) The heat lost (kJ). (e) The work done (kJ). For steam the following information is available: Cp = 34.7 J/mol.K) Cv = 28.2 J/(mol.K) M = 18 g/mol Additional information: F Fm.a P= ? , Closed system: Am=0 and AU RT Ideal gas: AU = CAT P- with R = 8.314 J/(molK) DW =-pdV AH = Q+W. V E = mu? E-m.8.2 ud (gau su + du? + sac p = + + gaz ?m=Q+W AU=Q+W, H=U + PV All other