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Author: Subject: thermodynamics
kloga
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[*] posted on 10-12-2014 at 20:13
thermodynamics

what is the enthalpy change during the process in which 100 grams H2O at 50C is cooled to ice at -30C? c(s) 2.09 J/g-C c(I) 4.18 J/gC c(g) 1.84 J/gC heat of vaporization= 40.67 kJ/mol heat of fusion= 6.01 kJ/mol.
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macckone
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[*] posted on 10-12-2014 at 20:15


This is not the correct sub-forum for homework problems.
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kloga
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[*] posted on 10-12-2014 at 20:15


can u answer it
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macckone
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[*] posted on 10-12-2014 at 20:21


The teacher gave you a homework problem so you could learn to answer it.
Hint: at 50C water is a liquid. You must cool it 50C. Then you must freeze it.
Then you must cool the solid ice 30C.
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Bert
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