2023

Chemistry

POST UTME

2NO(e) + 2CO(g) - N2 + 2CO2(g) H = -89.3 KJ. What conditions would favour maximum conversion of nitrogen (Il) oxide and carbon II) oxide in the reaction above?

A.

Low temperature and high pressure

B.

Low temperature and low pressure

C.

High temperature and low pressure

D.

high temperature and high pressure

Correct Answer:
Low temperature and high pressure

Explanation

2NO $_(g)$ + 2co $_(g)$ $----->$ N $_2(g)$ + 2CO $_2(g)$ $\Delta$ H =-89.3KJ
-Since the forward reaction (conversion of NO and CO) is exothermic, it is favoured by a decrease in temperature
-Since the forward rotation proceeds with a decrease in volume (decrease in gaseous moles), it is favoured by an increase in pressure

2NO $_(g)$ + 2co $_(g)$ $----->$ N $_2(g)$ + 2CO $_2(g)$ $\Delta$ H =-89.3KJ

-Since the forward reaction (conversion of NO and CO) is exothermic, it is favoured by a decrease in temperature

-Since the forward rotation proceeds with a decrease in volume (decrease in gaseous moles), it is favoured by an increase in pressure

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