8.3 Heat/Specific Heat

If two blocks of aluminum are heated with the same amount of energy, which will have the smallest change in temperature?

• The smaller block (5 kg) will have the smallest change in temperature because it has less mass.

• The larger block (10 kg) will have the smallest change in temperature because it has more mass.

• Both blocks will have the same change in temperature regardless of their mass.

• The larger block (10 kg) will have the largest change in temperature because it can absorb more energy.

What is heat transfer?

• Heat transfer is the flow of thermal energy from warmer objects to cooler objects.

• Heat transfer is the process of converting thermal energy into mechanical energy.

• Heat transfer is the movement of heat through a vacuum without any medium.

• Heat transfer is the increase in temperature of an object due to external energy sources.

What is the formula for calculating heat energy?

• Q = mcΔT

• Q = mΔT

• Q = mcT

• Q = mTΔ

What happens to the temperature of a substance when it absorbs heat?

• The temperature of the substance decreases as it absorbs heat energy.

• The temperature of the substance remains constant as it absorbs heat energy.

• The temperature of the substance increases as it absorbs heat energy.

• The temperature of the substance fluctuates randomly as it absorbs heat energy.

Which material has a higher specific heat, clay or iron?

• Clay has a higher specific heat than iron.

• Iron has a higher specific heat than clay.

• Both clay and iron have the same specific heat.

• Neither clay nor iron has a specific heat.

How does the size of a container affect the thermal energy of a substance at the same temperature?

• A larger container holds more substance, thus it has more thermal energy at the same temperature compared to a smaller container.

• The size of the container does not affect the thermal energy of the substance at the same temperature.

• A smaller container holds more thermal energy because it is more compact.

• Thermal energy is only dependent on the temperature, not the size of the container.

What is convection?

• The transfer of heat through the movement of fluids due to differences in temperature.

• The process of heat transfer through direct contact between materials.

• The transfer of heat through electromagnetic waves.

• The movement of air caused by the rotation of the Earth.

What is the relationship between mass and temperature change when heating a substance?

• The greater the mass of a substance, the smaller the temperature change for a given amount of heat energy added.

• The greater the mass of a substance, the greater the temperature change for a given amount of heat energy added.

• Mass has no effect on the temperature change when heating a substance.

• Temperature change is independent of the mass of the substance being heated.

What is specific heat?

• The amount of heat energy required to raise the temperature of 1 kilogram of a substance by 1 degree Celsius.

• The total heat energy contained in a substance at a given temperature.

• The heat energy required to change a substance from solid to liquid at its melting point.

• The heat energy required to raise the temperature of 1 liter of water by 1 degree Celsius.

What is an example of a substance with low specific heat?

• Water

• Copper

• Aluminum

• Iron