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26 Sep 2009, 2:53 PM
| #1 (permalink) |
| Senior Member HSC: 2009 Gender: Female
Join Date: Sep 2007
Posts: 329
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Yesterday, 11:40 PM  | 2008 molar heat of combustion question You can hide this advertisement by registering. question 10.. thanks guys http://www.boardofstudies.nsw.edu.au...-chemistry.pdf |
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26 Sep 2009, 3:00 PM
| #2 (permalink) |
| Senior Member HSC: 2009 Gender: Male
Join Date: Nov 2008
Posts: 235
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16 Nov 2009, 2:26 AM | Re: 2008 molar heat of combustion question ΔH=-mcΔT =-1000gx4.18x50° =-209.0 kJ of heat required we know that 1367 kJ is released when 1 mole of ethanol is combusted. 1 mole = 46.0g therefore the mass of ethanol needed = (209/1367) x 46 =7.0g |
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