dry steam (gas) and moisture (water), it possesses properties like those of gases : namely, pressure, volume, temperature, internal energy, enthalpy and entropy. But the pressure, volume and temperature of steam as a vapour are not connected by any simple relationship such as is expressed by the characteristic equation. hf = 419.04 kJ/kg. The saturation temperature of water at atmospheric pressure is 100˚C. The addition of more heat will not….