Question

2.2 Define Dormant heat of melting?​

Answer 1

The 'enthalpy' of fusion is a latent heat, because during melting the heat energy needed to change the substance from solid to liquid at atmospheric pressure is latent heat of fusion, as the temperature remains constant during the process. ... The liquid phase has a higher internal energy than the solid phase.

Answer 2

Answer:

The dormant heat or Latent heat of fusion is the heat energy required ( in joules /J ) to convert 1Kg of Solid into liquid at atmospheric pressure . The latent heat of melting is 3.5*10^5 J/Kg

Explanation:

During the change of state ( from solid to liquid ) the temperature remain constant at 100°C until the whole matter is converted into liquid state . So the heat energy stored here is in the form of latent heat of fusion . This means that 1 Kg of water at hundred degree Celsius has 3.5 * 10^5 J more heat than 1 kg of liquid at same temperature .