申論題

1. (15%) The pressure derivative of entropy at the constant temperature is written in termns of_P. Ifliquid ammonia at 350 K is compressed from saturation pressure of 270 kPa to 1000 kPa, determine its enthalpy (△H, kJ/kg) and entropy (△S, kJ/kg-K) changes. For saturated liquid ammonia at 350 K, liquid volume and volume cxpansivity (β) are 1.551 x 10^-3 m³• kg^-1and2.095 x 10^-3 K^-1, respectively.