# Problem: Given the following free energies of formation calculate K p at 298 K for: C2H2 (g) + 2 H2 (g) → C2H6 (g) C2H2(g)      ΔG°f = 209.2 kJ/mol C2H6(g)      ΔG°f = -32.9 kJ/mol a) 9.07 x 10 –1 b) 97.2 c) 1.24 x 10 31 d) 2.74 x 10 42 e) None of these is within a factor of 10 of the correct answer.

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Given the following free energies of formation calculate K p at 298 K for:

C2H(g) + 2 H(g) → C2H(g)

C2H2(g)      ΔG°f = 209.2 kJ/mol

C2H6(g)      ΔG°f = -32.9 kJ/mol

a) 9.07 x 10 –1

b) 97.2

c) 1.24 x 10 31

d) 2.74 x 10 42

e) None of these is within a factor of 10 of the correct answer.

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Our tutors have indicated that to solve this problem you will need to apply the Gibbs Free Energy concept. You can view video lessons to learn Gibbs Free Energy. Or if you need more Gibbs Free Energy practice, you can also practice Gibbs Free Energy practice problems.

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