The following gaseous reaction is taking place in a vessel: $C_2H_4(g) + H_2(g) \rightleftharpoons C_2H_6(g)$; $\Delta H = -32.7 \ kcal$. Which of the following will increase the equilibrium concentration of $C_2H_6$?

  • A
    Increase of temperature
  • B
    By reducing temperature
  • C
    By removing some hydrogen
  • D
    By adding some $C_2H_6$

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