Thermal Properties and Temperature

Which statement best describes a metal experiencing thermal expansion?

• The size of the metal atoms increases

• The space between the metal atom increases.

• The metal atoms change state

• The metal atoms gain enough energy to overcome the intermolecular forces of attraction holding them in place.

A rise in temperature of a substance increases its

• gravitational potential energy

• specific heat capacity

• mass

• internal energy

Wooden barrels are often reinforced by putting tight iron rings around them.

What procedure would make it easier to get the iron ring onto the barrel?

• Heating the barrel

• cooling the iron ring

• soaking the barrel in water

• heating the iron ring

Internal energy is affected by two properties of the particles which make up a substance.

Identify the two properties.

• Motion and position

• acceleration and mass

• specific heat capacity and volume

• state of matter and potential energy

Which of the following statements defines the specific heat capacity of a substance?

• The energy required to raise the temperature of 1 kg of a substance by 1 degree celsius

• The energy per degree celsius required to raise the temperature of a substance

• The increase in length of 1 kg of a substance when its temperature is increased by 1 degree celsius

• The energy required to change 1 kg of a substance from a liquid to a liquid gas.

Two metal cylinders, P and Q, are heated using an electric heater. Both of the cylinder receive exactly the same amount of thermal energy.

The temperature of P increase by a smaller amount than the temperature of Q.

What conclusion can be drawn?

• P is a better thermal conductor

• Q is a better thermal conductor

• P has a higher thermal capacity

• Q has a higher thermal capacity

A student takes two block, block 1 and block 2, of different metals and heats them until the temperature of both has risen by 20 degree celsius.

She then leaves both blocks on the desk to cool.

Block 2 has a greater thermal capacity than block 1.

Which of the block loses more energy as it cools to room temperature, and which of the block required more energy to raise its temperature by 20 degree celsius?

• A

• B

• C

• D

Which material heats up quickest?

• Aluminium

• diamond

• Water

• concrete

• glass

Which will heat up slower?

• water

• granite

• iron

• lead

Which of the following best explains why the sand at the beach is hotter than the water?

• Sand has a higher specific heat than water.

• There is more water than sand at the beach.

• Sand has a lower specific heat than water.

• There is more sand than water at the beach.