One mole of monoatomic gas and three moles of diatomic gas are put together in a container. The molar specific heat (in $J\,{K^{ - 1}}\,mo{l^{ - 1}})$ at constant volume is $(R = 8.3\,J\,{K^{ - 1}}\,mo{l^{ - 1}})$
  • A$18.7$
  • B$18.9$
  • C$19.2$
  • D
    None of the above
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