First slide
Change in internal energy
Question

The amount of heat energy required to raise the temperature of 1 g of Helium at NTP, from T1KtoT2K is

Moderate
Solution

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=14

CV=32R          He  is  a  monatomic ΔT=T2T1   ΔQ=1432RT2T1 =38NakBT2T1               kB=RNa

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