Question

Ammonia (NH3 (g), Delta.Hf = –45.9 kJ/mol ) reacts with oxygen to produce nitrogen and water (H2 O(g), Delta.Hf = –241.8 kJ/mol) according to the equation below.
4 upper N upper H subscript 3 (g) plus 3 upper O subscript 2 (g) right arrow 2 upper N subscript 2 (g) plus 6 upper H subscript 2 upper O (g).

What is the enthalpy of the reaction?
Use Delta H r x n equals the sum of delta H f of all the products minus the sum of delta H f of all the reactants.
–3,572.1 kJ
–1,267.2 kJ
1,267.2 kJ
3,572.1 kJ

Answer 1

The enthalpy of the reaction according to given information is –1,267.2 kJ

What is Enthalpy of the reaction ?

The Heat of Reaction (also known and Enthalpy of Reaction) is the change in the enthalpy of a chemical reaction that occurs at a constant pressure.

It is a thermodynamic unit of measurement useful for calculating the amount of energy per mole either released or produced in a reaction.

Therefore, The enthalpy of the reaction according to given information is –1,267.2 kJ

Learn more about Enthalpy here ;

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