# Problem: Which of the following expressions describes the heat evolved in a chemical reaction when the reaction is carried out at constant pressure?a. ΔE - wb. ΔEc. ΔE - q

###### FREE Expert Solution

Recall that the change in internal energy, ΔE is given by:

$\mathbf{∆}\mathbf{E}\mathbf{=}\mathbf{q}\mathbf{+}\mathbf{w}$

At constant pressure:

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###### Problem Details

Which of the following expressions describes the heat evolved in a chemical reaction when the reaction is carried out at constant pressure?
a. ΔE - w
b. ΔE
c. ΔE - q