ethanol 46g/mol freezes at 3.65degC density changes from 0.789g/cm-3 to 0.801g/cm-3 latent hear of fusion 8.68kJ/mol. freezing point at 1000 atm.(adsbygoogle = window.adsbygoogle || []).push({});

i calculated the ansfer from an example and just want to verify if its correct.

dp/dt=(dfusH)/(t*dfusV) rearanged to dt=(dp*t*dfusV)/dfusH

where dfusV: change in molar volume on melting

okay, with the rearanged equation i changed 1000 atm to pascals = 101325 kPa dfusV was calculated to be 4.875399e-6 m3/mol

i came to a change in temperature of 15.54deg hence final freezing point is 11.8956degC.

could anyone plese help me and tell me if this is correct

also.. in teh equation t=273.15K was used.. could anyone please tell me why this was the case?

thanks

patrick.

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# Homework Help: Freezing point estimation

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