PHYc - Chapter10 Thermal Properties of Matter

What is internal energy of the molecules in the substance?

• Kinetic Energy

• Potential Energy

• Kinetic energy

  and

  Potential energy

Which energy is directly related to the temperature of a substance?

• Potential energy

• Kinetic energy

Which energy is directly related to the distance / forces of attraction between the molecules?

• Potential energy

• Kinetic energy

A substance is heated from point P to point Q. Thermal energy is converted to _____ energy that results in an increase of temperature of the substance.

• Potential and Kinetic

• Potential

• Gravitational

• Kinetic

 

The temperature remain constant from point Q to point R during melting point.

What state is observed during melting point?

• solid

• liquid

• solid + liquid

• liquid + gas

During melting point (point Q-R), the molecules gain _____ energy

• Potential

• Kinetic

• Potential & kinetic

During solidification/freezing process (state changes from liquid to solid), there is no change in kinetic energy but there is change in potential energy.

• True

• False

Blocks of gold are made by pouring hot, molten gold into moulds. The gold cools to its melting point and begin to solidify.

As it solidifies, its temperature

[N12/1/9] & [N17/1/10]

• decreases and energy is released from the gold

• decreases and no energy is released from the gold

• stays constant and energy is released from the gold

• stays constant and no energy is released from the gold

Boiling is the process that converts from a liquid to gaseous state, at temperature below boiling point of a substance

• True

• False

What is meant by the boiling point of a liquid [N13/1/9]

• The place in a liquid where both liquid and gas exist together

• The place in a liquid where it starts to bubble

• The temperature at which it begins to evaporate

• The temperature at which it can exist as both liquid and gas