Assessment Test 1 - Section 2: Thermal Physics (20 Questions)

Which state of matter has a fixed shape and fixed volume?

• Solid

• Liquid

• Gas

• Plasma

According to the kinetic theory, particles in a gas are:

• Closely packed and vibrate in fixed positions.

• Randomly arranged and move randomly at high speeds.

• Arranged in layers and slide past each other.

• Stationary and only vibrate.

What happens to the average kinetic energy of liquid molecules when the temperature of the liquid decreases?

• Decreases

• Increases

• Remains constant

• Becomes zero

Which temperature scale has its freezing point of water at 0∘ and boiling point at 100∘?

• Fahrenheit

• Kelvin

• Celsius

• Rankine

What is the SI unit for specific heat capacity?

• Joule

• Joule per kilogram

• Joule per degree Celsius

• Joule per kilogram per degree Celsius

How much heat energy is needed to raise the temperature of 1.5 kg of copper from 20∘C to 40∘C? (Specific heat capacity of copper = 385 J/(kg∘C))

• 5775 J

• 11550 J

• 23100 J

• 46200 J

Which process involves a substance changing from gas to liquid?

• Evaporation

• Melting

• Condensation

• Sublimation

What is the term for the heat energy absorbed or released during a phase change at constant temperature?

• Specific heat

• Latent heat

• Thermal energy

• Internal energy

Which method of heat transfer involves the transfer of energy through the vibration of particles in direct contact?

• Conduction

• Convection

• Radiation

• Evaporation

Which type of material is the poorest conductor of heat?

• Steel

• Aluminium

• Copper

• Air