Why is more heat energy needed to vaporise sodium chloride than to melt it?

Question

Please answer seriously..Thanx

Answer 1

To vaporise it, NaCl has to undergo 2 changes in states; solid-liquid and liquid-gas. This involves both the latent heat of fusion and that of vaporisation as well as the energy required to raise it temperature from the melting to the boiling point.

To melt, NaCl would only require to change from the solid to the liquid state.

Answer 2

this is all down to the latent heat of melting and vaporisation. this is affected by the heat capacity. more heat is required to make it a vapor than a liquid due to the associated change in entropy - degree of randomness. Gases are more random than liquids hence the additional heat requirement - heat is energy

Answer 3

Sodium chloride melts at a lower temperature than it vapourises, you need more heat to raise the temperature to vapourisation level

Answer 4

any compound or element has to undergo changes in state when you heat it..

so if you have sodium chloride solid, it has to go to a liquid before it goes to a gas...

think about ice... if you heat ice then it turns to water and then it condensates and turns into water vapour...if you trap this water vapour and cool it it would then go back into water then by cooling even further it would go back to ice...

it is the same for every element/compound