What is the relationship between ΔH and ΔU for a reaction at constant pressure?
Practice Questions
Q1
What is the relationship between ΔH and ΔU for a reaction at constant pressure?
ΔH = ΔU + PΔV
ΔH = ΔU - PΔV
ΔH = ΔU
ΔH = PΔV
Questions & Step-by-Step Solutions
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.