Lesson: Internal Energy

In this lesson, we will learn how to describe the internal energy of an object in terms of the changes in the kinetic and potential energy of its particles.

Worksheet: 3 Questions

Q1:

In the kinetic model of an ideal gas, the internal energy of a gas is modeled as consisting of only the kinetic energy of the particles of the gas. Which of the following statements most correctly describes why this approximation is effective in modeling some changes in real gases?

Q2:

The specific latent heat of a substance is the energy required to change the phase of an object made of the substance that has a mass of one kilogram.

While an object is changing phase, does the average distance between its particles change?

While an object is changing phase, does the average kinetic energy of its particles change?

While an object is changing phase, does the average potential energy of its particles change?

While an object is changing phase, does its internal energy change?

While an object is changing phase, does its temperature change?

Q3:

Which of the following statements most correctly describes the internal energy of an object in terms of the net kinetic energy of its particles and the net potential energy of its particles ?

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