Question

During the constant volume reversible non-flow process with air, the temperature drops from 400K to 320K. Show process on the p-V and T-s coordinates and find the heat transfer in kJ/kg.

Answer 1

$T_1=$ 400 K,$T_2= 320 K$ and we know that,$C_v= 0.718$

Heat transfer= CvdT= $0718\times(320 -400)$

Heat trasnfer= -57.44 kJ