Use combustion of ethane at 25degree C to answer follwoing.

Question

C2H6(g) 7/2 O2 (g) >> 2 CO2(g) 3 H2O(l)

a) Would you predict this rxn to be product or reactant favored?

b) Calculate the value of delta S universe.

c)Calculate teh value of delta G^0 for the reaction.

Answer 1

b) 3 ( 69.96 Kj/mol) + 2 ( 213.6 Kj/mol) - (229.5 KJ/mol) + 7/2 (205.0)

= 637.08 KJ/mol  - 947 KJ/mol

S = - 309.92 KJ/mol.

C) Its the same as the S universe one but this time just use gibbs values for each compound.