Question

Question 3 (1 point) REACTION A: C2H4020) EDED CH2OH(1) + CO(g) This process takes place in three steps: S1 (fast): C2H4O2 + H D e C2H5027 S2 (slow): C2H302 Den HCO+ + CH3OH s3 (fast): HCo* Get CO + H+ 1. Which of the following energy diagrams likely corresponds to Reaction A? Reaction Path

Answer 1

The following reaction, - C2H4O2()% CH4OH () + Colg) This process is a multistep process, the steps are following, step 1: C2H4O2 +H+ — C2150, (fast) Step 2: C2H502 + H20+ + CH 0h (slow) Step 3: Hcot —> H+ +60 (fast) Now if we look at a general energy profice diagnom of a neaction (say) - A-7B to th 46° coordinak → 46 # > Activation energy of the reaction. It determi- nis if the neaction would be fast on slow. If aGE is high means more acliva- Reaction -him energy then the reaction will be slow and it it is lower, then the neaction will be fast ... standard AGO y Free energy change between products and reacfaints (GPB - GA) Acconding to the modynamics , AG° must be A negative for a process to be favourable. Now, if we look at the 1st Energy profile diagram, P A The ist step has may be more on equal activation energy with - bespect to and step. But in condition ist step must to sha be faster than and step. so, it is wrong fat

Nao if we look at the and energy profire diagram AU The Roat Here Ant is great eater than AGE and 4 at then it is matching with all the conditions R.C. & told here ist step= fast and step = slow So, it may be connect. 3rd step = fast Now, if we look at the and energy profile diagram. Hene, 44 x 4G which does not satisfy the condition R.C. so, this diagrom is wrong. Now if we look at the 4th diagrom. - 4a product line the problem is . + - - - . R .C. Ah neactants the Gibbs free energy of product Ah" is highly positive Ah" product is very high than 'reactant so, caºtre According to thermodynamics, this is unfavourable so, this diagrom is also wrong

so, the connect diagnom is The and one Reaction Profile