The Pressure-Dependence of Free Energy

What does the Maxwell relation indicate about the relationship between volume and free energy change?

• Volume is independent of free energy change.

• Volume is directly proportional to temperature.

• Volume is inversely proportional to pressure.

• Volume is equal to the change in free energy with respect to pressure at constant temperature.

What is the first step in solving the differential equation for Gibbs energy change?

• Differentiate with respect to volume.

• Add a constant to both sides.

• Separate variables and integrate both sides.

• Multiply both sides by temperature.

For ideal gases, what substitution is made for the change in volume in the integral?

• NRT over V

• NRT over P

• P over NRT

• V over NRT

Why is volume considered a strong function of pressure for gases?

• Because volume is constant for all gases.

• Because volume is independent of pressure.

• Because volume is only dependent on temperature.

• Because volume can be expressed as NRT over P.

How is the volume of solids and liquids treated differently from gases in terms of pressure dependence?

• Volume is directly proportional to pressure for solids and liquids.

• Volume is inversely proportional to pressure for solids and liquids.

• Volume is independent of pressure for solids and liquids.

• Volume is a strong function of pressure for solids and liquids.

What is the equation used to calculate Gibbs energy change for solids and liquids?

• Delta G2 = Delta G1 - Delta V * Delta P

• Delta G2 = Delta G1 + Delta V * Delta P

• Delta G2 = Delta G1 + V2 - V1

• Delta G2 = Delta G1 + NRT ln(P2/P1)

What additional term is added to the Gibbs energy equation for ideal gases?

• NRT times the natural log of T2 over T1

• NRT times the natural log of P1 over P2

• NRT times the natural log of V2 over V1

• NRT times the natural log of P2 over P1