What is the relationship between enthalpy (H), internal energy (U), pressure (P)
Practice Questions
Q1
What is the relationship between enthalpy (H), internal energy (U), pressure (P), and volume (V)?
H = U + PV
H = U - PV
H = U + P/V
H = U - P/V
Questions & Step-by-Step Solutions
What is the relationship between enthalpy (H), internal energy (U), pressure (P), and volume (V)?
Step 1: Understand what enthalpy (H) is. It is a measure of the total energy of a system, including internal energy and the energy required to make space for it in the environment.
Step 2: Know what internal energy (U) is. It is the energy contained within the system due to the kinetic and potential energy of its molecules.
Step 3: Learn about pressure (P). It is the force exerted by the molecules of a substance per unit area.
Step 4: Understand volume (V). It is the amount of space that a substance occupies.
Step 5: Recognize the formula that connects these concepts: H = U + PV. This means that enthalpy (H) is equal to internal energy (U) plus the product of pressure (P) and volume (V).
Step 6: Realize that this relationship helps in understanding how energy changes in a system, especially during processes like heating or chemical reactions.
