Enthalpy of Freezing
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Enthalpy of Freezing
Is the symbol for enthalpy of freezing -∆Hfus or is there another symbol we should use?
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Re: Enthalpy of Freezing
I think its the same symbol for both freezing and melting which is ∆Hfus. It's just freezing is from liquid to solid so the value is negative because the reaction is exothermic (-∆Hfus) where as melting is endothermic (+∆Hfus).
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Re: Enthalpy of Freezing
That is correct but the negative is arbitrary since it depends on the direction of the phase change
Re: Enthalpy of Freezing
Sorry if I'm totally off, but wouldn't the negative sign be required and not arbitrary in this case. I believe freezing is the reverse reaction of melting/fusion. Since melting/fusion is endothermic and therefore has a positive enthalpy value, wouldn't freezing be exothermic and therefore have a negative enthalpy value?
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Re: Enthalpy of Freezing
Yep, that's right! I think Kaelie made a small error in her 1st statement, but everything else is correct.
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