Thermodynamics: Gibbs Energy and Equilibrium

Thermodynamics: Gibbs Energy and Equilibrium

Assessment

Interactive Video

Chemistry, Physics, Science

11th - 12th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial explains equation 15.4, a fundamental thermodynamics equation linking the equilibrium constant (K) to the standard Gibbs energy change (Delta G). It highlights the use of the natural logarithm of K and the significance of the negative sign in the equation. The derivation process is outlined, showing how Gibbs energy concepts are applied. Finally, the equation's application at equilibrium is discussed, emphasizing that at equilibrium, Delta G is zero and the ratio of product to reactant activities equals K.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does Equation 15.4 in thermodynamics link together?

Standard Gibbs energy change and temperature

Equilibrium constant and standard Gibbs energy change

Equilibrium constant and enthalpy change

Enthalpy change and temperature

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the significance of Equation 15.4 in thermodynamics?

It links the equilibrium constant to the standard Gibbs energy change

It determines the pressure of a reaction

It predicts the temperature of a reaction

It calculates the volume of a reaction

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does a large positive value of K indicate about ΔG standard?

ΔG standard is negative

ΔG standard is undefined

ΔG standard is positive

ΔG standard is zero

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the natural logarithm of K in the equation signify?

It indicates the reaction is endothermic

It relates to the spontaneity of the reaction

It is unrelated to the reaction

It shows the reaction is exothermic

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the role of the negative sign in the equation relating K and ΔG?

It indicates a direct relationship

It shows an inverse relationship

It has no significance

It indicates a proportional relationship

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the derivation of the equation, what is the simplest reaction model considered?

One mole of reactant produces one mole of product

One mole of reactant produces two moles of product

Two moles of reactant produce two moles of product

Two moles of reactant produce one mole of product

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the expression for Gibbs energy of any substance according to Chapter 14?

Standard Gibbs energy minus RT logarithm of activity

Standard Gibbs energy divided by RT logarithm of activity

Standard Gibbs energy plus RT logarithm of activity

Standard Gibbs energy times RT logarithm of activity

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