Heat and Thermodynamics

What is specific heat capacity?

• The ability of a substance to conduct electricity

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

• The amount of energy required to change a substance from solid to liquid

• The measure of a substance's resistance to change in temperature

Explain the concept of thermal expansion.

• Thermal expansion is the tendency of matter to become lighter in response to a change in temperature.

• Thermal expansion is the tendency of matter to change color in response to a change in temperature.

• Thermal expansion is the tendency of matter to become less dense in response to a change in temperature.

• Thermal expansion is the tendency of matter to change in shape, area, and volume in response to a change in temperature.

What is evaporation and how does it relate to heat?

• Evaporation is the process of a solid turning into a gas, and it relates to cold because it requires energy in the form of cold to break the bonds between the solid molecules.

• Evaporation is the process of a gas turning into a liquid, and it relates to heat because it requires energy in the form of heat to form the gas molecules.

• Evaporation is the process of a gas turning into a solid, and it relates to heat because it requires energy in the form of heat to form the solid molecules.

• Evaporation is the process of a liquid turning into a gas, and it relates to heat because it requires energy in the form of heat to break the bonds between the liquid molecules.

Define latent heat and provide an example of its application.

• Latent heat is the heat absorbed during a change in temperature without a change in state. An example of its application is the burning of wood.

• Latent heat is the heat released during a change in state with a change in temperature. An example of its application is boiling water.

• Latent heat is the heat released during a change in state without a change in temperature. An example of its application is the freezing of water.

• Latent heat is the heat absorbed or released during a change in state without a change in temperature. An example of its application is the melting of ice. When ice melts, it absorbs latent heat from its surroundings without a change in temperature.

How is specific heat capacity different from heat capacity?

• Specific heat capacity measures heat required for a unit mass, while heat capacity measures heat required for the entire substance.

• Specific heat capacity is measured in joules, while heat capacity is measured in calories.

• Specific heat capacity is used for solids, while heat capacity is used for liquids and gases.

• Specific heat capacity measures the temperature change, while heat capacity measures the energy change.

What is the formula to calculate the change in length due to thermal expansion?

• ΔL = αΔT/L

• ΔL = αLΔT

• ΔL = L/ΔT

• ΔL = αTΔL

Describe the process of evaporation and its effect on temperature.

• Evaporation cools the temperature of the remaining liquid.

• Evaporation causes the temperature of the remaining liquid to fluctuate.

• Evaporation has no effect on the temperature of the remaining liquid.

• Evaporation increases the temperature of the remaining liquid.

Differentiate between sensible heat and latent heat.

• Sensible heat is only found in solids, while latent heat is only found in liquids

• Sensible heat is invisible, while latent heat is visible

• Sensible heat can be sensed or measured by a thermometer, while latent heat is absorbed or released during a change of state without a change in temperature.

• Sensible heat is related to the sense of touch, while latent heat is related to the sense of taste

How does the specific heat capacity of water compare to other substances?

• Not related to the specific heat capacity of other substances

• The same as most substances

• Lower than most substances

• Higher than most substances

Explain the concept of phase change and its relation to latent heat.

• Phase change is the change in temperature of a substance, and latent heat is the heat energy absorbed by the substance.

• Phase change is the change in color of a substance, and latent heat is the heat energy released during this change.

• Phase change is the change in pressure of a substance, and latent heat is the heat energy required to maintain this pressure.

• Phase change is the transition of a substance from one state to another, and latent heat is the heat energy absorbed or released during this transition.