Grade 12Physical Chemistry
what is the term heat of fusion meant? Can you explain it thoughrly. It help me too much
what is the term heat of fusion meant? Can you explain it thoughrly. It help me too much
2 Answers
Arun
Heat of fusion' measures the amount of energy needed to melt a given mass of a solid at its melting point temperature. Conversely, it also represent the amount of energy given up when a given mass of liquid solidifies. Water, for example, has a heat of fusion of 80 calories per gram.
Rajdeep
HELLO THERE!
Heat of fusion refers to the amount of heat required (or energy required) to change the phase of a solid to liquid (melting) at a constant temperature (known as melting point of the solid).
For example, when ice changes to water, it has to accept heat. It’s Latent heat of fusion is 336 Jg-1 or 80 cal g-1. This means that 1 gram of ice absorbs 336 Joule of heat to melt to water at 0oC (it’s melting point).
Again, when water freezes to ice, it releases heat. It releases 336 Joule per gram as it freezes.
Hope it is clear!
Thanks!
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