Question

Calculate the energy produced (kJ) when 54.2 g dinitrogen oxide is decomposed. 2N2O(g) = 2N2(g) + O2(g) DH = -164.1 kJ N2O 44.01 g/mol

Please post steps

Answer 1

2N₂O(g) 2N₂(g) + O₂(g)

H= -164.1 kJ

From the balanced equation, decomposition of 2 moles of  N₂O(g) produces 164.1 kJ of energy.

Molar mass of  N₂O = 44.01 g / mol

Therefore,

2* 44.01 g of  N₂O(g) will produce 164.1 kJ of energy on decomposition.

88.02 g of  N₂O(g) will produce 164.1 kJ of energy on decomposition.

Energy produced by decomposition of 54.2 g of  N₂O(g) = [164.1 kJ / 88.02 g ] * 54.2 g

= 101.05 kJ