Q.

One mole of ideal diatomic gas is taken from state A → B → C as shown in P-T diagram. The total heat absorbed by the gas in the complete process is

1 2RT0  
2 3RT0  
3 4RT0  
4 6RT0  

Ans.

(4)

Net heat absorbed by one mole of diatomic gas in going from A→B (isochoric process) and B→C (isobaric process) is ΔQ=CvΔT+CpΔT=52RT0+72RT0

ΔQ=6RT0