The reaction `C_(2)H_(6)(g) iff C_(2)H_(4)(g)+H_(2)(g)` is at equilibrium in a closed vessel at 1000 K. The enthalpy change `(DeltaH)` for the reaction is 137.0kJ `mol^(-1)`. Which one of the following actions would shift the equilibrium to the right ?
A. Decreasing the volume of the closed reaction vessel
B. Decreasing the temperature at which the reaction is performed
C. Adding an inert gas to the closed reaction vessel.
D. Increasing the volume of the closed reaction vessel.
