Heat is supplied to a di-atomic gas at constant pressure. ratio of Delta Q : Delta U : Delta W is

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11.Thermodynamics

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Heat is supplied to a di-atomic gas at constant pressure. The ratio of $\Delta Q : \Delta U : \Delta W$ is

A

$5 : 3 : 2$

B

$5 : 2 : 3$

C

$7 : 5 : 2$

D

$7 : 2 : 5$

Solution

At constant pressure

$\mathrm{dQ}=\mu \mathrm{C}_{\mathrm{p}} \mathrm{dT} ; \mathrm{du}=\mu \mathrm{C}_{\mathrm{v}} \mathrm{dT}$

$\mathrm{dW}=\mu \mathrm{RdT}$

for diatomic Gas,

$C_{p}=\frac{7}{2} R ; C_{v}=\frac{5}{2} R$

Standard 11

Physics

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