Question

one mole of an ideal monoatomic gas is taken through the cycle shown in the figure.

the process A:B is a reversible isothermal expansion.

Given. P(A)=5atm V(A)=10litre

P(B)=1atm V(B)=50litre

P(C)=1atm V(C)=10litre

a.calculate the net work done by the gas

b.the energy added to the gas.

c.the energy expelled by the gas.

d.the efficiency of the cycle.

Answer 1

a)

$A=5~kJ,$

b)

$U=7.5~kJ,$

c)

$U=-7.5~kJ,$

d)

$\eta=67\%.$