In the reactionN2 (gas) + O2 (gas) -------> 2NO(gas) delta H = +171KJHow much heat (KJ) is absorbed when 2.3 grams of nitrogen monoxide gas is produced?Group of answer choice…

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asked Apr 12, 2023 51.5k views

1 Answer

Mkamioner · Answer 1 · 2023-04-17T18:33:24+0000

According to the given reaction, 2 moles of NO are produced.

Using the molecular mass of NO we can find the mass produced:

$2molNO\cdot(30gNO)/(1molNO)=60gNO$

It means that when 60g of NO are produced the heat absorbed is 171KJ.

Use this ratio to find the heat absorbed when 2.3 grams are produced:

$2.3gNO\cdot(171kJ)/(60gNO)=6.555kJ$

It means that the correct answer is 6.5kJ.