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OpenStudy (anonymous):
C40H82 ---> C16H34 + C24H48 The question is asking to find the enthalpy change which is bonds broken - bonds formed. The problem is the answer written is bonds broken is 4x (c-c) - 2x (c=c) = 1400-1220= +180kjmol^-1 but how they got 4 and 2? Shouldn't it be 40x (c-c)?
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