The Delta. Hrxn of formation of carbon dioxide is negative. Which statement is true? The reaction is endothermic. The reaction is exothermic. The amount of carbon dioxide is more than the amount of reactants. The amount of carbon dioxide is less than the amount of reactants.

The reaction is exothermic.

Explanation:

Enthalpy of Formation (ΔHrxn):

It is regarded as the variation in enthalpy when a mole of substance is produced at standard temperature and pressure through its pure elements under same conditions.

1) ΔHrxn = negative

When the energy is produced in the course of production of compound in a chemical reaction. It is known as Exothermic reaction.

2) ΔHrxn = posituve

When the energy taken in in the course of the production of compound in a chemical reaction. It is known as Endothermic reaction

The of production of carbon dioxide is negative. It implies that the ΔHrxn is an exothermic reaction.

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