Enthalpy Change and Constant Pressure
The change in enthalpy, $\Delta H$, is often used to describe the heat transfer for a chemical reaction and is frequently considered a close approximation of the total energy change. This usage is most appropriate for reactions conducted under which of the following conditions?
A
Reactions occur at constant pressure
B
Reactions occur at constant temperature
C
Reactions involve no work
D
Reactions occur at constant volume
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