Heat and Thermodynamics 5 Question 3

3. When heat Q is supplied to a diatomic gas of rigid molecules, at constant volume, its temperature increases by ΔT. The heat required to produce the same change in temperature, at a constant pressure is

(2019 Main, 10 April II)

(a) 23Q

(b) 53Q

(c) 32Q

(d) 75Q

Show Answer

Solution:

  1. Given, heat supplied at constant volume is Q.

Q=nCVΔT

For same change in temperature, if heat supplied at constant pressure is Q, then

So, we have

Q=nCpΔT

QQ=nCpΔTnCVΔTQQ=CpCV

Q=Qγ[γ=CpCV]

As given gas is diatomic, so γ=75

Q=75Q



जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक