if the activation energy of forward and backward reactions in a chemical reaction A--- B is 15 5 and 22 - Chemistry - Surface Chemistry

Question

if the activation energy of forward and backward reactions in a
chemical reaction A--->B is 15 5 and 22 7 kj mol-1 respectively
then select the correct option for the reaction

1) delta H of reaction is 38 2 KJ/mol
2) Reaction is always spontaneous
3) Decreaseing the activation energy
4) Decreasing the rate constant

Hina Parveen · Accepted Answer

Dear Student,
Given: Eaforward = 15 5 KJ/mole
Eaâ€‹Backward = 22 7 KJ/mole

∆H=Eaforward-Eabackward∆H= 15 5-22
7∆H= 
since the activation energy of forward is less than the activation
energy of backward then the reaction will be spontaneous
hence option (b) is the correct answer