Question

The vessel contains an ideal monoatomic gas which expands at constant pressure when heat is given when then work done in expansion is

Answer 1

considering the isobaric process

we already know that

Q=n$C_{p}$ΔT

W=nRΔT

for isobaric process$C_{p}$=γRγ-1$C_{p}$

=γRγ-1

Here γRγ denotes the adiabatic index or heat capacity ratio.

For the mono atomic gases γ=53

⇒ΔWΔQ=R$C_{p}$=γ-1γ

=53-153=0.4

=40%

Finally It is the fraction of heat supplied for external work or energy.