Under what conditions is the change in internal energy, δerxn , equal to the heat evolved in a chemical reaction?.

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21-10-2022
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Under what conditions is the change in internal energy, δerxn , equal to the heat evolved in a chemical reaction?.

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anzlaiman anzlaiman · Answer 1 · 2022-10-30T16:50:50+01:00

At constant volume, the change in internal energy is equal to heat evolved in a chemical reaction.

Moreover, If there is a change in the internal energy of the system, there must be an exchange of energy between the system and the surroundings. This energy flow is either in the form of heat or work. Therefore, we equate any change in the system's internal energy with the sum of heat and work.

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