Question

Curve in the figure shows an adiabatic compression of an ideal gas from `15m^3` to `12m^3`, followed by an isothermal compression to a final volume of `3.0m^3`. There are 2.0 moles of the gas. Total heat supplied to the gas is equal to: (ln2= 0.693)

A. 4521 J
B. `-4521J`
C. `-6653 J`
D. `-8476 J`

Answer 1

Correct Answer - C
There is no heat transfer in adiabatic compression. In isothermal process
`Q=W=P_(1)V_(1) ln. (V_(2))/(V_(1))=400xx12 ln 1/4 =-6653 J`