The Isomerization of Methyl Isocyanide,CH₃NC → CH₃CN,follows First-Order Kinetics

The isomerization of methyl isocyanide,CH₃NC → CH₃CN,follows first-order kinetics.The half-lives were found to be 161 min at 199°C and 12.5 min at 230.°C.Calculate the activation energy for this reaction.(R = 8.314 J/mol • K)

A) 6.17 × 10^-3 kJ/mol
B) 31.4 kJ/mol
C) 78.2 kJ/mol
D) 124 kJ/mol
E) 163 kJ/mol