Question

A diatomic gas$(γ = 1.4)$ does $400$ $J$ of work when it is expanded isobarically. The heat given to the gas in the process is ________ $J$.

Answer 1

The heat given to the gas in the process is $\underline{1400}$ $J$.

$W = nRΔT = 400$ $J$

$∴ ΔQ = nC_PΔT$

=$n\times\frac{7}{2}R\timesΔT=\frac{7}{2}\times400=1400$