Question

Which energy is absorbed during the change of state ?

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

Answer 1

The correct option is B

Latent heat

The explanation for correct option:
(B) Latent heat

• Latent heat is defined as the heat or energy that is absorbed or released during a phase change of a substance.
• It could either be from a gas to a liquid or liquid to solid and vice versa.
• Latent heat is related to a heat property called enthalpy.

The explanation for incorrect options:
(A) Specific heat

• Specific heat, the quantity of heat required to raise the temperature of one gram of a substance by one Celsius degree.

(C) Heat capacity

• Heat capacity is defined as the amount of heat energy required to raise the temperature of a given quantity of matter by one degree Celsius.

(D) Heat of sublimation

• The latent heat of sublimation at a particular temperature is the amount of heat required to convert a unit mass of solid into gas.
• For example, when ice sublimates into vapor, the amount of heat required at 0°C is estimated equal to 2,838 kJ/kg, which is the latent heat of sublimation of ice at 0°C.
  Hence option B is correct.