Which statement correctly defines sensible heat?

Which statement correctly defines sensible heat?

• A. Sensible heat involves phase changes at constant temperature.
• B. Sensible heat changes temperature without phase change.
• C. Sensible heat only occurs at high pressures.
• D. Sensible heat is independent of temperature.

Answer: (B)

Sensible heat is the heat that changes the temperature of a substance without causing a phase change. When you add sensible heat, the material warms up or cools down, and its temperature shifts according to the amount of heat transferred, the mass, and the material’s specific heat (Q = m c ΔT). During a phase change, the energy goes into changing the substance’s phase rather than its temperature, so the temperature stays nearly constant while heat is absorbed or released—this is latent heat, not sensible heat. Sensible heat is not tied to high pressure and it isn’t independent of temperature; it depends on how much the temperature changes. That’s why the statement that sensible heat changes temperature without a phase change is the correct description.

Sensible heat is the heat that changes the temperature of a substance without causing a phase change. When you add sensible heat, the material warms up or cools down, and its temperature shifts according to the amount of heat transferred, the mass, and the material’s specific heat (Q = m c ΔT).

During a phase change, the energy goes into changing the substance’s phase rather than its temperature, so the temperature stays nearly constant while heat is absorbed or released—this is latent heat, not sensible heat.

Sensible heat is not tied to high pressure and it isn’t independent of temperature; it depends on how much the temperature changes. That’s why the statement that sensible heat changes temperature without a phase change is the correct description.