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Define latent heat. What are the S.I. Un...

Define latent heat. What are the `S.I`. Units of latent heat?

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It is the amount of heat required to change the state of a unit mass of substance without any rise in the temperature `Q = mL`, where `Q` is heat, m is mass and `L` is latent heat `S.I`. Unit of latent heat is `J kg^(-1)`.
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