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Mary Becerra 2D wrote:Why can we equate delta H (heat transfer at constant pressure) and delta U (heat transfer at constant volume)?
You can not always equate delta H (enthalpy) to delta U (internal energy). The two are only equal when you have constant pressure and constant volume. This is true because at constant pressure ΔH = ΔU + PΔV. So, if the volume is constant, the change in volume would be 0. Therefore, ΔH = ΔU + P(0) so, ΔH =ΔU.
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