Which term describes the ability of a substance to store thermal energy, defined as the amount of heat required to raise its temperature by 1 degree Celsius?

Which term describes the ability of a substance to store thermal energy, defined as the amount of heat required to raise its temperature by 1 degree Celsius?

• A. The amount of heat required to raise the temperature by 1°C
• B. The rate at which heat is lost to the surroundings
• C. The energy needed to vaporize a substance
• D. The total heat content at a given temperature

Answer: (A)

The concept being tested is heat capacity—the ability of a substance to store thermal energy. It is defined as the amount of heat required to raise the temperature of a given quantity of substance by 1°C. Because heat capacity depends on how much material you have, more mass means more heat is needed to achieve that 1°C rise. If you were talking per unit mass, that would be the specific heat capacity, but the definition here describes heat capacity itself. The other options describe different ideas: rate of heat loss is how fast heat escapes, latent heat of vaporization is energy required for a phase change, and total heat content (enthalpy) depends on temperature and amount but isn’t defined simply as the heat needed to raise temperature by 1°C.

The concept being tested is heat capacity—the ability of a substance to store thermal energy. It is defined as the amount of heat required to raise the temperature of a given quantity of substance by 1°C. Because heat capacity depends on how much material you have, more mass means more heat is needed to achieve that 1°C rise. If you were talking per unit mass, that would be the specific heat capacity, but the definition here describes heat capacity itself. The other options describe different ideas: rate of heat loss is how fast heat escapes, latent heat of vaporization is energy required for a phase change, and total heat content (enthalpy) depends on temperature and amount but isn’t defined simply as the heat needed to raise temperature by 1°C.