The following two cracking reactions for n-pentane occur in parallel:

At 183°C and 0.5 bar, both these reactions contribute to the equilibrium composition of species in the system. For every 1.0 mole of n-pentane gas initially fed, 0.10 mol of propylene (C3H6) is formed at equilibrium from Reaction I. Calculate the equilibrium amount of trans-2-butene formed per mol of pentane fed. You may assume that Dhrxn for each reaction does not change with temperature.

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and C5H12(g) C3H6(g) + CH6(g) C5H12(g) trans C4Hs(g) + CH4(g) (I) (II)