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Standard enthalpy of formation of ethane is -84.7kjper mol calculate the enthalpy change for the formation of 0.1kg ethane |
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Answer» We have given, Standard enthalpy of formation of ethane = -84.7 kJ/mol molecular weight of ethane = 30 g/mol ∴ No. of moles of ethane in 0.1 kg or 100 g of ethane = \(\frac{100\,g}{30\,g/mol}\) = 3.333 mol ∵ Standard enthalpy of formation of one mole of ethane = -84.7 kJ ∴ Standard enthalpy of formation of 3.333 mole of ethane = -84.7 kJ/mol x 3.333 mol = -282.31 kJ Hence, enthalpy change for the formation of 0.1 kg ethane will be -282.31 kJ. |
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