# Problem: The change in enthalpy (∆H) is a measure of the heat of reaction at 1) Constant temperature. 2) Constant pressure. 3) Constant volume. 4) Constant internal energy. 5) Constant entropy.

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The change in enthalpy (∆H) is a measure of the heat of reaction at

1) Constant temperature.

2) Constant pressure.

3) Constant volume.

4) Constant internal energy.

5) Constant entropy.