Enthalpy - Chemistry

Question

Consider the following balanced reaction:

2 A₂ + B → C + 2 D

What is the enthalpy of reaction if the enthalpy of formation of the compounds is given as

Compound	Enthalpy of Formation (kJ/mol)
A2	-18.69
B	10.26
C	10.21
D	14.12

Answer 1

Given an equation: 2 A₂ + B → C + 2 D

ΔH_rxn = ΣH_products - ΣH_reactants

ΔH_rxn = (10.21 + 2*14.12) - ( 2*(-18.69) +10.26 )

ΔH_rxn = 65.57 ^kJ/_mol