Class 11 NEET Physics Thermodynamics and Kinetic Theory

As here volume of the gas remains constant, therefore the amount of heat energy required to raise the temperature of the gas is
ΔQ=nCVΔT
Here, number of moles, n=

1

4

CV=

3

2

R (∵ He is a monatomic.)
ΔT=T2−T1
∴ΔQ=

1

4

×

3

2

R(T2−T1)
=

3

8

NakB(T2−T1) (∵kB=

R

Na

)