Respuesta :
Answer:
We expect the enthalpies of combustion of two isomers to be different.
The molecular formular of the two molecules are very similar.
So the balanced chemical equation for the two combustion reactions are the same.
Explanation:
In calculation of the combustion enthalpiesfrom the isomers of the products and reactant.
The difference will be in the standard enthalpies of formation of the two combustion products.
The rod-shaped n- octane has vibrational and rotational motion possible more than the almost spherical neoprene.
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We expect the enthalpy of combustion of two isomers to be different. The molecular formulas of two molecules are identical, so the balanced chemical equation for the two combustion reactions are same, in calculation of combustion enthalpy from isomers of products and reactants, the difference will be in the standard enthalpies of formation the two combustion products.
The rod-shaped n-pentane has vibrational and rotational motion possible than the almost spherical neopentane.
Heat of combustion:
- The heat of combustion (or any reaction) is the energy that is set free when you make the products (CO₂ and H₂O here, in their respective stoichiometric amounts) out of single atoms (this is the same for all isomers), minus the energy needed to break all bonds in the educts.
- If equal quantities of two isomeric hydrocarbons burn to produce equal amounts of carbon dioxide and water, the one releasing more energy (i.e., with the higher heat of combustion) is the less stable, since it was the more energetic in its compounded form.
Find more information about "Combustion" here:
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