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Topic: Entropy  (Read 1371 times)

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Offline ZKR

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Entropy
« on: January 23, 2013, 05:55:30 PM »
Hey guys,
hope you can help with something here.

50 gr of Ethanol, fus temp: -114 C. vap temp: 78 C.
C solid = .97 J / g K
C liquid = 2.42 J / g K
^H fus = 4.6 kJ / mol
^H vap = 43.5 kJ / mol

1. Calculate amount of heat needed to get it from -135C to -50C.
2. calc ^S tot
3. calc ^S tot for 1 mol at 252K and at 352K.

Any suggestions on the stages of answering that?

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