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Good day.
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The topic is about heat.
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When the substance absorbs or loses heat, its temperature may change or it may also that its face may change.
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When the substance loses or absorbs heat and thus cause its face to change, then the heat that is associated with that is solved as q equals ml, where m is the mass of the substance and l is the latin heat.
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Depending on what type of phase change the substance undergoes, l can be defined differently.
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So, for example, if the substance undergoes vaporization, then we have l as the latent heat of vaporization.
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Now, let us suppose we have a 20 kilogram silver that is at its melting temperature of 960 .8 degrees celsius, and we wish to find the temperature or rather the heat that is needed to completely melt it...