1.

Proceeding from the heat of formation of gaseous carbon dioxide. (ΔH°f = -393.5 kJ mol-1) and the thermochemical equation:C(graphite) + 2N2O(g) → CO2(g) + 2N2(g)ΔH° = -557.5 kJCalculate the heat of formation of N2O(g)

Answer»

C(graphite) + 2N2O(g) → CO2(g) + 2N2(g)

ΔH° = -557.5 kJ

ΔH° = ΣΔH°f(products) - ΣΔH°freactants

ΔH = ΣCO2(g) + 2ΔHfN2 - 2ΔHfN2O(g) - ΔH°(graphite)

-557.5 kJ = -393.5 kJ + 2 x 0 - 2ΔHfN2O(g) = 0

2ΔHfN2O(g) = -393.5 kJ + 557.5 kJ

ΔHfN2O(g) = \(\frac{164.0}{2}\)kJ = 82.0 kJ mol-1



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