Problem: In the gas phase, methyl isocyanate (CH 3NC) isomerizes to acetonitrile (CH 3CN), H3C−N≡C (g) ⇄ H3C−C≡N (g) with ΔHo = –89.5 kJ/mol and ΔGo = –73.8 kJ/mol at 25oC. What is the equilibrium constant, Kp, for this reaction at 100oC, assuming that the enthalpy and entropy of reaction are independent of temperature. a) 4.62 x 10 ‐11 b) 1.68 x 10 ‐10 c) 5.96 x 109 d) 5.36 x 109 e) 8.64 x 1012

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In the gas phase, methyl isocyanate (CH 3NC) isomerizes to acetonitrile (CH 3CN),

H3C−N≡C (g) ⇄ H3C−C≡N (g)

with ΔHo = –89.5 kJ/mol and ΔGo = –73.8 kJ/mol at 25oC. What is the equilibrium constant, Kp, for this reaction at 100oC, assuming that the enthalpy and entropy of reaction are independent of temperature.

a) 4.62 x 10 ‐11

b) 1.68 x 10 ‐10

c) 5.96 x 109

d) 5.36 x 109

e) 8.64 x 1012

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