$c_P$ and $c_V$ are specific heats at constant pressure and constant volume respectively. It is observed that

$c_P - c_V = a$ for hydrogen gas

$c_P - c_V = b$ for nitrogen gas

The correct relation between $a$ and $b$ is

  • A$a = \frac{1}{{14}}b$
  • B$a=b$
  • C$a=14b$
  • D$a=28b$
JEE MAIN 2017, Medium
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