The equation of a certain gas can be written as: ${\left( {\frac{{{T^7}}}{{{P^2}}}} \right)^{1/5}} = $ constant. The specific heat at constant volume of this gas is in $\left( {in\frac{J}{{mol\,K}}} \right)$
  • A$0.5\, R$
  • B$1.5\, R$
  • C$2\, R$
  • D$2.5\, R$
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