What is the relationship between ΔH and ΔU for a reaction at constant pressure?

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Question: What is the relationship between ΔH and ΔU for a reaction at constant pressure?

Options:

Correct Answer: ΔH = ΔU + PΔV

Solution:

At constant pressure, the relationship is given by ΔH = ΔU + PΔV.

What is the relationship between ΔH and ΔU for a reaction at constant pressure?

What is the relationship between ΔH and ΔU for a reaction at constant pressure?

Step 1: Understand that ΔH is the change in enthalpy and ΔU is the change in internal energy of a system.
Step 2: Recognize that at constant pressure, the enthalpy change (ΔH) can be related to the internal energy change (ΔU).
Step 3: Know that the formula connecting these two is ΔH = ΔU + PΔV.
Step 4: Identify that P is the pressure and ΔV is the change in volume of the system during the reaction.
Step 5: Conclude that this formula shows how the change in enthalpy accounts for both the change in internal energy and the work done due to volume change at constant pressure.

No concepts available.