Chapter 5 Thermal Energy and Heat

Front

What is thermal expansion?

Back

Thermal expansion is the increase in volume of a substance due to an increase in temperature, which causes the kinetic energy of its particles to increase.

Front

What is conduction?

Back

Conduction is the transfer of heat energy through direct contact between materials, where heat moves from the hotter object to the cooler one.

Front

What is radiation in the context of heat transfer?

Back

Radiation is the transfer of energy by electromagnetic waves, which can occur through a vacuum or transparent medium.

Front

How does heat transfer occur between two objects at different temperatures?

Back

Heat transfer occurs from the hotter object to the cooler object until thermal equilibrium is reached.

Front

What is the formula to calculate temperature change?

Back

Temperature change can be calculated using the formula: ΔT = T_final - T_initial.

Front

What happens to the kinetic energy of particles in a substance when it is heated?

Back

When a substance is heated, the kinetic energy of its particles increases, causing them to move more rapidly.

Front

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

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, indicating how much energy a material can store.

Front

What is the difference between conduction, convection, and radiation?

Back

Conduction is heat transfer through direct contact, convection is heat transfer through fluid movement, and radiation is heat transfer through electromagnetic waves.

Front

What is the role of a thermometer in measuring temperature?

Back

A thermometer measures temperature by utilizing the principle of thermal expansion, where the fluid inside expands or contracts with temperature changes.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature and density.