1. Tardigrade
  2. Question
  3. Physics
  4. 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 constant, R=8.314 Jmol -1 K -1 )

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Q. 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 constant, $R=8.314 \,Jmol ^{-1} K ^{-1}$ )

AP EAMCETAP EAMCET 2015

Solution:

Given,
$C_{V} =12.6 \,J\, mol ^{-1} K ^{-1} $
$R =8.314 \,J m\,ol ^{-1} K ^{-1} $
The specific heat of helium at constant pressure,
$C_{p}=C_{V}+R=12.6+8.314=21$