# Determine the standard enthalpy of formation for N2O given the following information about the formation of NO2 under standard conditions, and ΔHf (NO2) = +33.2 kJ/mol.2N2O(g)+3O2(g) ---> 4NO2(g)             ΔHrxn= -31.4 kJ

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Determine the standard enthalpy of formation for N2O given the following information about the formation of NO2 under standard conditions, and ΔHf (NO2) = +33.2 kJ/mol.

2N2O(g)+3O2(g) ---> 4NO2(g)             ΔHrxn= -31.4 kJ

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Step 1

Hess's law

The enthalpy change of a reaction is calculated by subtraction of sum of standard enthalpy of formation of reactants from sum of standard enthalpy of formation of products.

Step 2

At the standard state, the standard enthalpy of formation all substances are zero.

Given:

ΔHf (NO2) = +33.2 kJ/mol, ΔHrxn= -31.4 kJ.

The balanced reaction and enthalpy values are,

Step 3

Substitute the given values in above equation to get st...

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