Question

For the gaseous reaction $C_2H_4 + H_2 \rightleftharpoons C_2H_6$, $\Delta H$ = –130 kJ mol⁻¹ carried in a closed vessel, the equilibrium concentration of C₂H₆ can definitely be increased by :
(a) increasing temperature and decreasing pressure
(b) decreasing temperature and increasing pressure
(c) increasing temperature and pressure both
(d) decreasing temperature and pressure both

Answer 1

The correct option is (b).

Explanation:-

Since the reaction is exothermic, it will be favoured at low temperature.

And by Le-Chatalier's principle if we increase the pressure then the reaction proceeds towards less number of gaseous moles.