Question

An ideal gas is enclosed inside a chamber with a volume of 0.1 ft3 at 115 deg. Celsius

and 690 kPa. It then expands isentropically to a final pressure of 138 kPa. Calculate

the mass, final temperature, final volume, change in enthalpy and non-flow work done

during the process for this gas. Assume Cv = 0.7201 kJ/kg.K and Cp = 1.0048 kJ/kg.K

Answer 1

$m=3.2~kg,$

$t_2=83°C,$

$V_2=0.04~ft^3,$

$∆H=1.7~\frac{kJ}K,$

$A=12.1~kJ.$