Stereoisomer Posted September 23, 2009 Report Share Posted September 23, 2009 (edited) Hey guys!I was reading through my textbook today and I found a worked example that got me very confused...What mass of propanol must be burnt in excess air to produce 10000 kJ of energy according to the following thermochemical equation?2C3H7OH + 9O2 ---> 6CO2 + 8H2O deltaH = -4034 kJ/molSo this seems simple enough. But the worked solution states:From the equation, 2 mol of propanol yields 4034kJ of energy, so x mol of propanol yields 10000kJ of energy.WAIT WAIT WAIT. the deltaH value states -4034 kJ PER MOL. then why does 2 mol of propanol yields 4034 kJ of energy? Shouldn't it yield 8068 kJ of energy intead?I think I must be wrong because that example originated from a standard textbook. However, I do not understand why the solution in the textbook is correct. Please feel free to enlighten me. Thanks in advance Edited September 23, 2009 by MistyRose Reply Link to post Share on other sites More sharing options...
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