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CBSE Class 11-science Answered

Among the enthalpies of fusion and enthalpies of freezing, which one is positive and which one is negative and why?
Asked by Topperlearning User | 15 Jun, 2016, 05:39: PM
answered-by-expert Expert Answer

Melting is endothermic process, so all enthalpies of fusion are positive because ice requires heat for melting. While in freezing of water equal amount of heat is given to surrounding i.e. freezing is exothermic process. Thus all enthalpies of freezing are negative.

Answered by | 15 Jun, 2016, 07:39: PM

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