Answer to Question #312183 in Molecular Physics | Thermodynamics for miz

Question

A perfect gas has a molar mass of 26 kg/kmol and a value of 𝛾 = 1.26. Calculate the heat rejected when unit mass of the gas is contained in a rigid vessel at 3 bar and 315℃, and is then cooled until the pressure falls to 1.5 bar. Assuming that 𝐶𝑣 = 1.229 𝑘𝐽/𝑘𝑔𝐾 and 𝐶𝑝 = 1.548 𝑘𝐽/𝑘𝑔𝐾. 

Answer 1

$A=\frac{\nu RT_1}{\gamma-1}(1-(\frac{p_2}{p_1})^{\gamma-1})=80.6~J.$