Thermal Energy and Heat Transfer

What is conduction?

• Transfer of heat through sound waves

• Transfer of heat through fluid movement

• Transfer of heat through electromagnetic waves

• Transfer of heat through direct contact between particles of a substance

Explain the process of convection.

• Transfer of heat through the movement of fluids

• Transfer of heat through the movement of electromagnetic waves

• Transfer of heat through the movement of gases

• Transfer of heat through the movement of solids

What is radiation and how does it transfer heat?

• Radiation is a type of solid material that transfers heat

• Radiation transfers heat through conduction

• Radiation transfers heat through electromagnetic waves.

• Radiation transfers heat through convection

Define specific heat capacity.

• The amount of energy required to change a substance from a solid to a liquid at its melting point

• Amount of heat required to raise the temperature of a unit mass of a substance by one degree Celsius

• The measure of the average kinetic energy of the particles in a substance

• The ability of a substance to conduct heat

How does thermal equilibrium occur?

• Thermal equilibrium is achieved when the temperature of an object keeps increasing indefinitely.

• Thermal equilibrium occurs when one object is heated while the other is cooled.

• Two objects at the same temperature come into contact and reach different temperatures.

• Two objects at different temperatures come into contact and reach the same temperature.

List and explain the different heat transfer methods.

• Conduction, convection, and radiation

• Expansion, compression, and diffusion

• Evaporation, condensation, and sublimation

• Reflection, absorption, and transmission

Give an example of conduction in everyday life.

• Touching a metal spoon that has been sitting in a hot pot of soup

• Holding a plastic cup of hot coffee

• Sitting near a fireplace

• Touching a cold ice cream cone

Describe the process of heat transfer in a boiling pot of water.

• Convection

• Reflection

• Absorption

• Radiation

How does radiation from the sun transfer heat to the Earth?

• Convection

• Reflection

• Conduction

• Electromagnetic waves

Calculate the specific heat capacity of a substance given its mass, change in temperature, and the amount of heat transferred.

• c = Q / (m * ΔT)

• c = Q - (m * ΔT)

• c = Q * (m * ΔT)

• c = Q + (m * ΔT)