Consider the equilibrium c2h6(g)⇌c2h4(g)+h2(g). at 1000. k and a constant total pressure of 1.00 bar, c2h6(g) is introduced into a reaction vessel. the total pressure is held constant at 1 bar and at equilibrium the composition of the mixture in mole percent is h2(g): 26.6 %, c2h4(g): 26.6 %, and c2h6(g): 46.8 %.