Thermal Properties Quiz 1

What is the internal energy of a substance?

• It is the amount of internal molecular forces between the particles in a substance.

• It is the kinetic energy that particles in a substance have.

• It is the potential energy that particles in a substance have.

• It is both the kinetic and potential energies that particles in a substance have.

What does the internal potential energy of particles in a substance depend on?

• The motion of the particles

• The temperature the substance is subjected to

• The interatomic or intermolecular bonds of the particles

• All of the above

What happens to the internal kinetic energy of the particles in a substance when the temperature of the substance increases?

• decrease

• increase

• no change

Why does the temperature of a substance remain constant when a substance is melting even though thermal energy is being supplied to it?

• The particles are further apart.

• The particles are moving faster.

• The solid is not absorbing any thermal energy.

• The thermal energy is used to break the bonds between the particles.

At which point is the substance melting?

• A

• B

• C

• D

At which point is the substance a liquid?

• A

• B

• C

• D

When the object increases in temperature, thermal energy from the surrounding is absorbed by the object to increase the ________ energy of its particles.

When a substance is heated from 25 ^oC to 50 ^oC,

• its kinetic energy decreases.

• its potential energy decreases.

• its kinetic energy increases.

• its potential energy increases.

When a substance is cooled from liquid to solid,

• its kinetic energy decreases.

• its potential energy decreases.

• its kinetic energy increases.

• its potential energy increases.

When a substance is heated from liquid to gas,

• its kinetic energy decreases.

• its potential energy decreases.

• its kinetic energy increases.

• its potential energy increases.