The rate constant for the reaction 2HI(g)-->H2(g) I2(g) doubles on raising the temperature from 410 centigrade

Question

to 425 centigrade the activation energy is J/mol is (please exaplin step by step)

a)5.3 *10^5

b)1.8 *10^5

c)9.1*10^4

d)6.7*10^4

Answer 1

Use the Arrhenius equation.

ln (k2/k1) = Ea/R (1/T1 - 1/T2)

ln (2) = Ea/8.31 (1/683 - 1/698)

0.693 = Ea/8.31 (3.15 x 10^-5)

0.693 = Ea (3.79 x 10^-6)

183,000 J = Ea = 183 kJ/mol . . .CHOICE b