Question

A perfect gas with R = 320 J/kg-K and Cp = 1.6 kJ/kg-K. If 150 kJ of heat is added to 5 kg of this gas at constant pressure when t1 = 35 oC, find (a) the work nonflow, (b) U, (c)S.

Answer 1

b)

$\Delta U=p\Delta V=46.7~kJ,$

c)

$A=Q-\Delta U=103.3~kJ,$

c)

$S=\frac Q{\Delta T}=487.0~\frac JK.$