What is the standard enthalpy changes of combustion of ethane?

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Solution

The standard enthalpy of combustion is the enthalpy associated with the combustion of one mole of the substance under standard conditions. And thus for ethane, it is the enthalpy associated with the following reaction:

$C_{2} H_{6} (g) + \frac{7}{2} O_{2} (g) \to 2 C O_{2} (g) + 3 H_{2} O (l) + Δ$

$Δ H_{c o m b u s t i o n}^{o} = - 1560. k J . m o l^{- 1}$

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What is the standard enthalpy changes of combustion of ethane?

The standard enthalpy of combustion is the enthalpy associated with the combustion of one mole of the substance under standard conditions. And thus for ethane, it is the enthalpy associated with the following reaction:C2H6(g)+72O2(g)→2CO2(g)+3H2O(l)+Δ ΔHocombustion=−1560. kJ.mol−1