Answer: The letter representing enthalpy of reaction is [tex]\Delta H[/tex]
Explanation:
Enthalpy of the reaction is defined as the difference in the change in total energy of the product and change in total energy of the reaction. It is represented by [tex]\Delta H[/tex]
Mathematically,
[tex]\Delta H_{rxn}=\sum \Delta H_{products}-\sum \Delta H_{reactants}[/tex]
where,
[tex]\Delta H_{products}[/tex] = change in energy of the products
[tex]\Delta H_{reactants}[/tex] = change in energy of the products
This term comes out to be negative for exothermic reaction and positive for endothermic reactions.
Hence, the letter representing enthalpy of reaction is [tex]\Delta H[/tex]
