US123456
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I have attached a pic of the question. pls help
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US123456
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this is the question
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emilya18
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I’m fairly sure it’s -2220 kJ/mol
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emilya18
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hang on I’ll show you how I did it, it’s been a few months since i’ve done any chemistry though
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emilya18
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Name:  61F2CCDF-E508-425E-B5CC-AE411EB41CBB.jpg.jpeg
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I did an energy cycle, and then worked it out using hess’ law. the bottom equation in the question is irrelevant, I think, so I just put the carbon and hydrogen at the bottom of the cycle, then used the enthalpies for the first 3 reactions to calculate the enthalpy for propane combustion
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(Original post by emilya18)
Name:  61F2CCDF-E508-425E-B5CC-AE411EB41CBB.jpg.jpeg
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I did an energy cycle, and then worked it out using hess’ law. the bottom equation in the question is irrelevant, I think, so I just put the carbon and hydrogen at the bottom of the cycle, then used the enthalpies for the first 3 reactions to calculate the enthalpy for propane combustion
thanks!
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