Question

The chemical equation for the combustion of ethanol is as follows:C2HyOH + 302 - 2002 + 3H20

Answer 1

5998kJ

Explanations:

Given the reaction between ethanol and oxygen expressed as:

`C_2H_5OH+3O_2\rightarrow2CO_2+3H_2O`

For the product

We have 2 moles of CO2 and 3 moles of water. The total bond energy in the product is expressed as:

`\begin{gathered} \triangle H_p=2(2C=O)+3(2O-H) \\ \triangle H_p=4(799)+6(467) \\ \triangle H_p=3196+2802 \\ \triangle H_p=5998kJ \end{gathered}`

Hence the total energy transferred to build all the bond energy in the product is 5998kJ