Thermal Equilibrium

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state in which two objects in contact with each other reach the same temperature, resulting in no net heat transfer between them.

Front

How does temperature relate to molecular motion?

Back

Temperature is a measure of the average kinetic energy of the molecules in a substance; higher temperatures indicate faster molecular motion.

Front

What is the direction of heat transfer?

Back

Heat always moves from hot to cold.

Front

What are the three types of heat transfer?

Back

The three types of heat transfer are conduction, convection, and radiation.

Front

What is conduction?

Back

Conduction is the transfer of heat through a solid material without any movement of the material itself, typically occurring through direct contact.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases), where warmer areas of a fluid rise and cooler areas sink.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves, which can occur in a vacuum.

Front

In the context of heat transfer, what happens when two objects at different temperatures come into contact?

Back

Heat will flow from the hotter object to the cooler object until thermal equilibrium is reached.

Front

What is the significance of the specific heat capacity of a substance?

Back

Specific heat capacity is the amount of heat required to raise the temperature of a unit mass of a substance by one degree Celsius; it determines how a substance responds to heat.

Front

How does the temperature of a substance affect its density?

Back

Generally, as the temperature of a substance increases, its density decreases because the molecules move apart, leading to an increase in volume.