Thermodynamic Favorability Concepts

In this video, Jeremy Krug discusses thermodynamically favored processes in AP Chemistry, focusing on the second law of thermodynamics. He explains how entropy and enthalpy influence chemical reactions, with examples illustrating when reactions are favored. The video concludes with a review and an introduction to Gibbs free energy, which will be covered in the next lesson.

What does the second law of thermodynamics state about the entropy of an isolated system?

• It decreases over time.

• It remains constant over time.

• It fluctuates randomly.

• It increases over time.

What is another term used in AP Chemistry for a spontaneous process?

• Equilibrium process

• Endothermic process

• Thermodynamically favored process

• Exothermic process

Which of the following is a driving force for a thermodynamically favored process?

• Constant temperature

• Increasing enthalpy

• Decreasing enthalpy

• Decreasing entropy

Under what condition is a reaction always thermodynamically favored?

• When it is exothermic and entropy increases

• When it is exothermic and entropy decreases

• When it is endothermic and entropy decreases

• When it is endothermic and entropy increases

What happens to a reaction that is endothermic with decreasing entropy?

• It is favored at all temperatures.

• It is not favored at any temperature.

• It is favored at high temperatures.

• It is favored at low temperatures.

In the reaction of carbon with steam, why is it not thermodynamically favored?

• Because it is endothermic and entropy increases

• Because it is endothermic and entropy decreases

• Because it is exothermic and entropy decreases

• Because it is exothermic and entropy increases

What is the thermodynamic favorability of a reaction with both negative Delta H and Delta S?

• Favored at high temperatures

• Favored at low temperatures

• Not favored at any temperature

• Favored at all temperatures

Which of the following reactions is likely to be favored at low temperatures?

• Exothermic with increasing entropy

• Exothermic with decreasing entropy

• Endothermic with decreasing entropy

• Endothermic with increasing entropy

What is the significance of Delta G in thermodynamics?

• It determines the pressure of reaction.

• It indicates the temperature of reaction.

• It quantifies thermodynamic favorability.

• It measures the rate of reaction.

What will be discussed in the next video following this lesson?

• Chemical equilibrium

• The first law of thermodynamics

• Gibbs free energy (Delta G)

• Reaction kinetics