$21$

$R=8\mathrm{.}514$JmolK,$R=83\mathrm{.}14cm$ bar$/$mol $*K,R=82\mathrm{.}06*c{m}^3*$ atm$/$mol $KI$

An ideal gas is expanding isothermally from point:$(1)T1=100*C,P_1=15$ atm topoint $(2)$ at $P_2=5$ atm. Then it undergoes an isochoric; process to point $(3),$ finaly br adtabatio compression point $(1)$ is reached. $($:$C_p=(\frac{7}{2})R,C_V=(\frac{5}{2})R\}$

a$)$ Sketch this on a$-$pressure versus volume diagramil

b$)$ Calcilate $*V_1,V2,*V3,-T2,T3,*P31$

G$)$ Calculate the heat and work$-$requirements and the Intemal Energy and Enthalor changes for each branch and the total$-$gycle. II