The first-order rate constant for the decomposition of ethyl iodide by the reaction

C₂H₅I(g) → C₂H₄ (g) + HI(g)

at 600K is 1.60 × 10^–5 s^–1. Its energy of activation is 209 kJ/mol. The rate constant of the reaction at 700K is-

1. 7.56 × 10^–3 s^–1
2. 6.36 × 10^–3 s^–1
3. 5.16 × 10^–3 s^–1
4. 5.76 × 10^–3 s^–1