Question

When an ideal diatomic gas is heated at constant pressure the ratio of work done to the heat supplied is?

Answer 1

Fraction of heat energy supplied which increases the internal energy:Letn = Number of moles the gasCv=Specific heat at constant volumeCp=Specific heat at constant pressuredT=Change in temperatureγ=Ratio of specific heats of gas△U△Q=nCvdTnCpdT           =CvCp            =1γFor diatomic gas, γ=7/5Hence,△U△Q=1γ=57