Specific Heat Capacity and Phase Changes

What is the formula for calculating heat energy (Q)?

• Q = mcΔT

• Q = mΔT

• Q = mc^2

• Q = mgh

Tags

NGSS.HS-PS3-4

Define specific heat capacity.

• The amount of heat energy required to raise the temperature of a unit mass of a substance by one degree Celsius.

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

• The heat energy required to change the state of a substance without changing its temperature.

• The heat energy lost by a substance when it cools down.

How does the specific heat capacity of metals compare to that of water?

• Metals have a higher specific heat capacity than water.

• Metals generally have a lower specific heat capacity than water, meaning they heat up and cool down more quickly.

• Metals and water have the same specific heat capacity.

• Metals have an infinite specific heat capacity compared to water.

What is the heat of vaporization for water?

• 540 cal/g

• 100 cal/g

• 250 cal/g

• 400 cal/g

What is specific heat capacity?

• The amount of heat required to raise the temperature of one gram of a substance by 1°C

• The total energy required to change the state of a substance

• The heat energy needed to increase the temperature of a substance by 10°C

• The energy required to melt one gram of a substance at its melting point

Tags

NGSS.HS-PS3-4

What is latent heat?

• The heat required to change the phase of a substance without changing its temperature.

• The heat required to raise the temperature of a substance by one degree Celsius.

• The heat released during a chemical reaction.

• The heat absorbed when a substance evaporates.

How does specific heat capacity affect climate?

• Substances with high specific heat capacity can moderate temperature changes, influencing climate and weather patterns.

• Specific heat capacity has no effect on climate.

• High specific heat capacity leads to extreme temperature fluctuations.

• Low specific heat capacity results in stable climate conditions.

What role does specific heat capacity play in cooking?

• It determines the flavor of the food.

• It affects how quickly food heats up and cooks, influencing cooking times and methods.

• It is responsible for the color of the food.

• It influences the nutritional value of the food.

What is the difference between specific heat and latent heat?

• Specific heat is the heat required to change the temperature of a substance, while latent heat is the heat required for a phase change.

• Specific heat is the heat required for a phase change, while latent heat is the heat required to change the temperature of a substance.

• Specific heat is the total heat energy in a substance, while latent heat is the heat energy lost during cooling.

• Specific heat is the heat required to vaporize a substance, while latent heat is the heat required to melt a substance.

What happens to the temperature of a substance during a phase change?

• The temperature increases continuously during the phase change.

• The temperature decreases continuously during the phase change.

• The temperature remains constant during a phase change, even though heat is added or removed.

• The temperature fluctuates randomly during the phase change.

Tags

NGSS.MS-PS1-4