To calculate the total energy of the reaction, we need to find the difference between the energy of the reactant and the energy of the products.
Total energy of the reaction = Energy of reactant - Energy of products
= 732 kJ/mol - 630 kJ/mol
= 102 kJ/mol
The total energy of the reaction is 102 kJ/mol.
Since the energy of the products is lower than the energy of the reactant, this reaction is exothermic. Therefore, the correct answer is:
102 kJ/mol, exothermic
Hydrogen bromide breaks down into diatomic hydrogen and bromine in the reaction shown.
2HBr → H2 + Br2
The energy of the reactant is 732 kJ/mol, and the energy of the products is 630 kJ/mol.
What is the total energy of the reaction? Is this reaction endothermic or exothermic?
Responses
102 kJ/mol, exothermic
–102 kJ/mol, exothermic
102 kJ/mol, endothermic
–102 kJ/mol, endothermic
1 answer