[anonake]

Hi guys;

i have a question which i am solving. Seems simple enough and just wanted to see if anyone could help? The reaction is the following:

A+B  C

It need to write down the rate expressions in terms of initial rate(i think it means at zero conversion) against total pressure.

The controlling or limiting step is the surface reaction step.

this is what i have gotten so far:

r=(kP_AP_B)/(1+k_AP_A+k_BP_B+k_CP_C)²

since it wants it expressed in zero conversion does that mean i get rid of anything with the product C?? and what about in terms of total pressure?

Sorry if my english isnt great