Place a cup of iced water onto a heat source and you will find that the temperature remains at 0° C until the ice has completely melted. Why is this the case?
In essence, the heat transferred goes inot the change of state, not an increase in temperature.
The amount of energy required to change a substance's state is called the latent heat.
Latent heat of fusion for a solid to a liquid, latent heat of vaporisation for a liquid to a gas
The amount required varies from substance to substance, as the molecular structure of the substance differs, with the energy being required to break the intermolecular bonds.
In essence, the heat transferred goes inot the change of state, not an increase in temperature.
The amount of energy required to change a substance's state is called the latent heat.
Latent heat of fusion for a solid to a liquid, latent heat of vaporisation for a liquid to a gas
The amount required varies from substance to substance, as the molecular structure of the substance differs, with the energy being required to break the intermolecular bonds.
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This video examines the concept of latent heat: the idea of energy going into a system not causing an increase in temperature, but instead changing the state of substance. |
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Below is a sample problem with a video that explain how to solve it. It is suggested you try the problem beforehand, as this actually aids understanding, even if you are unsure if you are correct.
Coming soon
