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| 22 Mar 2012 11:19 PM |
| Just go ahead and ask me questions. |
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| 23 Mar 2012 06:07 AM |
| Now seriously, YOU. SUCK. (on ice). |
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sinii
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| Joined: 30 Sep 2011 |
| Total Posts: 15218 |
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| 23 Mar 2012 07:46 AM |
Ethanol melts at –114 ºC and boils at 78 ºC. The enthalpy of fusion of ethanol is 5.02 kJ/mol, and its enthalpy of vaporization is 38.56 kJ/mol. The specific heats of solid and liquid ethanol are 0.97 J/g-K and 2.3 J/g-K, respectively. Which step absorbs the largest quantity of heat when 75.0 g of ethanol at –120 ºC is converted to the vapor at 78 ºC?
Please answer. |
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