Heat Capacity Versus Specific Heat: Key Concepts and Calculations

This tutorial covers the concepts of heat capacity and specific heat, explaining the difference between extensive and intensive properties. It provides examples of calculating the heat required to change the temperature of water and aluminum, and discusses the relationship between Celsius and Kelvin temperature scales. The video emphasizes the importance of understanding these concepts in scientific calculations.

What is the main difference between heat capacity and specific heat?

• Heat capacity is only applicable to liquids, while specific heat applies to solids.

• Heat capacity is an intensive property, while specific heat is extensive.

• Heat capacity depends on the amount of substance, while specific heat does not.

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

Which of the following is true about specific heat?

• It is the heat required to raise the temperature of 1 gram of a substance by 1 degree Fahrenheit.

• It is the heat required to raise the temperature of 1 kilogram of a substance by 1 degree Celsius.

• It is the heat required to raise the temperature of 1 liter of a substance by 1 degree Celsius.

• It is the heat required to raise the temperature of 1 gram of a substance by 1 degree Celsius.

In the example problem, what is the specific heat of water used?

• 3.18 joules per gram degree Celsius

• 4.18 joules per gram degree Celsius

• 6.18 joules per gram degree Celsius

• 5.18 joules per gram degree Celsius

How is delta T calculated in the example problem?

• By multiplying the initial and final temperatures

• By dividing the final temperature by the initial temperature

• By subtracting the initial temperature from the final temperature

• By adding the initial and final temperatures

Why is it unnecessary to convert between Celsius and Kelvin for delta T?

• Because both scales have the same absolute zero

• Because a change of 1 degree Celsius is equal to a change of 1 Kelvin

• Because Celsius is more accurate than Kelvin

• Because Kelvin is only used for gas calculations

What is the final answer for the heat energy required in the water example, in kilojoules?

• 33.6 kilojoules

• 36.3 kilojoules

• 30.6 kilojoules

• 39.6 kilojoules

What is the specific heat of aluminum calculated in the final example?

• 0.950 joules per gram degree Celsius

• 0.900 joules per gram degree Celsius

• 0.850 joules per gram degree Celsius

• 0.800 joules per gram degree Celsius

How is the specific heat of a substance calculated?

• By dividing the heat energy by the mass and temperature change

• By multiplying the heat energy by the mass and temperature change

• By adding the heat energy, mass, and temperature change

• By dividing the mass by the heat energy and temperature change

What is the mass of the aluminum sample used in the final example?

• 45 grams

• 50 grams

• 40 grams

• 35 grams

What is the temperature change (delta T) for the aluminum sample in the final example?

• 60 degrees Celsius

• 55 degrees Celsius

• 50 degrees Celsius

• 45 degrees Celsius