Question

What does the symbol (–Hfus) indicate in a phase change?

Answer 1

None of the above

Step-by-step explanation:

By definition heat of fusion (or enthalpy of fusion) is the acceleration of the solid molecules in response to applied energy (heat) turning solid substance into a liquid substance.

Answer 2

(D) Liquid is being formed.

Step-by-step explanation:

The enthalpy of fusion of a substance (–Hfus) is the change in its enthalpy when the substance changes its state from a solid to a liquid. It happens when heat is supplied to some quantity of substance which is originally in solid state & it turns into liquid.

Example- melting of ice.

To melt ice energy is required. Approximately, 333 kJ of energy is needed to heat 1 kg ice to convert into liquid.