Question

Use the synthesis of methanol to answer the quesCons below. CO(g) + 2H2(g) ? CH3OH(g) ΔHrxn...

Use the synthesis of methanol to answer the quesCons below.
CO(g) + 2H2(g) ? CH3OH(g) ΔHrxn = –90.8 kcal; Kc = 10.5 at 500˚C
a. (3 pts) Write the rate law for the forward reacCon. Assume this is an elementary
reacCon.
rate = ______________________
b. (3 pts) Write the rate law for the reverse reacCon. Assume this is an elementary
reacCon.
rate = ______________________
c. (3 pts) By staCng that a chemical reacCon is “elementary”, which one assumpCon is
made about the relaConship between the reacCon and its rate law?
i. The reacCon involves mulCple separate collisions of the starCng materials.
ii. The stoichiometry (moles) of each reactant matches its rate order.
iii. The reacCon involves only elements, not compounds.
iv. A elementary reacCon is one that Holmes understands, but Watson doesn’t.
d. (6 pts) At a given Cme in the reacCon, [CH3OH] = 0.50 M, [CO] = 0.25 M, and [H2] =
0.15 M. Calculate the reacCon quoCent (Q) at this point in the reacCon.
e. (3 pts) True or False? Based on the value of Q calculated in ques@on 1d, the reacCon
will shik to make more products in order to reach equilibrium._______
f. (6 pts) Using Le Châtelier’s Principle, briefly describe two ways (using pressure,
temperature, and/or concentraCon changes) in which this equilibrium could be shiked
to make more methanol (CH3OH).

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