When a Substance Changes Phase, from Solid to Liquid or Liquid

question 9

Multiple Choice

When a substance changes phase, from solid to liquid or liquid to vapor and vice versa, there is no change in temperature, even though heat is being added or removed. Why is there no change in temperature?

• A) During a phase change, energy is used to break/establish the intermolecular bonds rather than stored as kinetic energy of the molecules.
• B) During a phase change, temperature is not well defined since there are two phases involved.
• C) During a phase change, energy is needed to overcome the gravitational pull.
• D) During a phase change, the temperature measured is the last temperature of the measuring device.
• E) None of the above.

---

Definitions:

Cognitive Ability

The capacity of the brain to process information, learn from experiences, reason, and solve problems.

Liden's Servant Leadership

A leadership approach identified by Robert C. Liden that emphasizes the leader's role in serving the needs of followers, thus promoting their development and performance.

Dimensions Of Culture

The fundamental aspects that differentiate cultures from one another, including but not limited to power distance, individualism vs. collectivism, and uncertainty avoidance.

Transactional Leadership

A leadership style that focuses on the exchanges between leaders and followers, where compliance is rewarded and noncompliance may be punished.