∆H for the forward reaction is –92 kJ / mol.State why this value shows that the forward reaction is exothermic.
Question
∆H for the forward reaction is –92 kJ / mol.
State why this value shows that the forward reaction is exothermic.
Solution
The value of ∆H for the forward reaction is negative (-92 kJ/mol). In thermodynamics, a negative ∆H value indicates that the reaction is exothermic. This is because ∆H, or change in enthalpy, is a measure of the total energy of a system.
In an exothermic reaction, energy is released to the surroundings, which means the total energy of the system decreases. This decrease in energy is represented by a negative ∆H value. Therefore, a ∆H of -92 kJ/mol shows that the forward reaction is exothermic because it indicates that energy is being released in the reaction.
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