Question

How much heat is evolved when 12 g of CO reacts with NO2 .according to the following reaction ,
4CO(g) + 2 NO2 → 4CO2(g) + N2 (g). ΔH" = -1198 kg?

Answer 1

119.8 J of heat is evolved when 12 g of CO reacts with enough NO₂. ΔH=-119.8 J.

Step by step explanation:

Given that 4CO(g) + 2 NO2 → 4CO2(g) + N2 (g). ΔH = -1198 J , that is when 4 moles of CO reacts with NO₂ it releases 1198 Joules of energy.

That is $4*30=120 grams$ of CO reacts with enough NO₂ to release 1198 J of Heat.

⇒ 1 gram of CO reacts with enough NO₂ to release $\frac{1198}{120} J$ of Heat.

Therefore, 12 grams of CO reacts with enough NO₂ to produce $\frac{1198*12}{120} =119.8 J$ of heat.

ΔH =-119.8J as the heat is evolved when 12 g of CO reacts with enough NO₂