Ethanol undergoes decomposition to form two sets of products.
If the molar ratio of C₂H₄ to CH₃CHO formed is 8:1 in a set of product gas, determine the energy involved (in kJ) in the decomposition of 1 mole of ethanol.

Question

Ethanol undergoes decomposition to form two sets of products.

If the molar ratio of C₂H₄ to CH₃CHO formed is 8:1 in a set of product gas, determine the energy involved (in kJ) in the decomposition of 1 mole of ethanol.

TestHub · Accepted Answer

Based on the 8 ; 1 molar ratio, for every 1 mole of ethanol decomposed, $\frac{8}{9}$ moles follow reaction 1 and $\frac{1}{9}$ moles follow reaction 2.

Total energy = $\frac{8}{9} \times (- 45.54 k J) + (\frac{1}{9} \times (- 68.91 k J)$

Calculation $- 40.48 k J - 7.656 k J = - 48.136 k J$

The energy involved for 1 mole of ethanol is approximately $- 48.14 k J$ .

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