The specific heat of helium at constant volume is 12.6 Jmol^ -1 ~K^ -1 . The specific heat of helium at constant pressure in Jmol^ -1 ~K^ -1 is about (Assume the temperature of the gas is moderate, universal gas

Correct answer: D. 21 As C_V=12.6 ~J ~mol^ -1 ~K^ -1 is given in SI unit So, R=8314 ~J ~mol^ -1 ~K^ -1 Then, C_p=C_V+R=12.6+8.314=21

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JEE Main · Physics · Kinetic Theory of Gases

The specific heat of helium at constant volume is 12.6 Jmol^ -1 ~K^...

The specific heat of helium at constant volume is 12.6

\mathrm{Jmol}^{-1} \mathrm{~K}^{-1}

. The specific heat of helium at constant pressure in

\mathrm{Jmol}^{-1} \mathrm{~K}^{-1}

is about (Assume the temperature of the gas is moderate, universal gas constant,

R=8.314 \mathrm{Jmol}^{-1} \mathrm{~K}^{-1}

)

D. $21$

C_V=12.6 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}

is given in SI unit So,

R=8314 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}

Then,

C_p=C_V+R=12.6+8.314=21