42. In the combustion of 6 g of ethane was allocated 31

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42. In the combustion of 6 g of ethane was allocated 312 kJ. During the combustion of 34.4 g of a mixture of pentane and heptane was allocated in 1680 kJ. Is the molar ratio of pentane and heptane mixture, if it is known that in homologous series of alkanes enthalpy of combustion is increased to 660 kJ per mole of CH2 groups?

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Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)


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