What term describes the amount of energy required to raise the temperature of one gram of a substance by one degree Celsius?

• A. Heat of vaporization
• B. Specific heat capacity
• C. Molar heat capacity
• D. Latent heat

Answer: (B)

The correct answer is specific heat capacity. This term specifically refers to the quantity of heat energy required to raise the temperature of one gram of a substance by one degree Celsius.

Specific heat capacity is a key concept in thermodynamics and material science, as it varies between different substances. For instance, water has a high specific heat capacity, which means it can absorb a lot of heat without a significant change in temperature. This property is critical for understanding phenomena such as climate and weather patterns, as well as biological processes in living organisms that rely on the temperature regulation of water.

The other terms provided have distinct meanings that do not relate specifically to raising the temperature of one gram of a substance by one degree Celsius. Heat of vaporization refers to the energy required for a substance to transition from a liquid to a gas at its boiling point, while molar heat capacity refers to the energy needed to raise the temperature of one mole of a substance, not one gram. Latent heat is associated with phase changes that occur at constant temperature, such as melting or boiling, and does not involve temperature change in the context of the question.