The equation 2C3H7OH + 9O2 yield 6 CO2 + 8H2O is an example of what type of reaction

2 answers:

8 0

It's a complete combustion reaction
Complete combustion uses O2 and the product is CO2 where as incomplete combustion uses O2 but gives you Carbon and carbon monoxide

Furkat [3]2 years ago

3 0

Combustion reaction

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How does the presence of a catalyst affect the enthalpy of a reaction? Group of answer choices 1. It depends on whether you are

Otrada [13]

Answer:

Option 3. The catalyst does not affect the enthalpy change ( $\Delta H_\text{rxn}$ ) of a reaction.

Explanation:

As its name suggests, the enthalpy change of a reaction ( $\Delta H_\text{rxn}$ ) is the difference between the enthalpy of the products and the reactants.

On the other hand, a catalyst speeds up a reaction because it provides an alternative reaction pathway from the reactants to the products.

In effect, a catalyst reduces the activation energy of the reaction in both directions. The reactants and products of the reaction won't change. As a result, the difference in their enthalpies won't change, either. That's the same as saying that the enthalpy change $\Delta H_\text{rxn}$ of the reaction would stay the same.

Refer to an energy profile diagram. Enthalpy change of the reaction $\Delta H_\text{rxn}$ measures the difference between the two horizontal sections. Indeed, the catalyst lowered the height of the peak. However, that did not change the height of each horizontal section or the difference between them. Hence, the enthalpy change of the reaction stayed the same.