The mechanism for a reaction is given below. ( 4 marks)
Step 1: A + B → C Ea = 168 kJ/mol ΔH = −42 kJ/mol
Step 2: C + B → E + F Ea = 63 kJ/mol ΔH = 21 kJ/mol
Step 3: F + B → G Ea = 84 kJ/mol ΔH = 42 kJ/mol
a) Draw an accurate energy curve to represent the steps of this reaction.
b) What is the overall equation for this reaction?
c) What is the ΔH(forward) for the overall, or net reaction?
d) Which step is the rate-determining step?