Question

in the following equation for a chemical reaction, the notation (s), (l), or (g) indicates whether the substance indicated is in the solid, liquid, or gas state. 2so₂(g) + o₂(g) →2so₃(g) + energy. identify each of the following as a product or a reactant: o₂(g) reactant, so₂(g) reactant, so₃(g) product. when the reaction takes place energy is released. the reaction is exothermic.

Explanation:

Step1: Understand reactants and products

In a chemical - reaction equation $aA + bB
ightarrow cC + dD$, the substances on the left - hand side ($A$ and $B$) are reactants and the substances on the right - hand side ($C$ and $D$) are products. For the reaction $2SO_2(g)+O_2(g)
ightarrow2SO_3(g) + energy$, $SO_2$ and $O_2$ are on the left - hand side, so they are reactants, and $SO_3$ is on the right - hand side, so it is a product.

Step2: Recall exothermic reaction concept

An exothermic reaction is a chemical reaction in which energy is released. When the reaction $2SO_2(g)+O_2(g)
ightarrow2SO_3(g)+energy$ takes place, energy is released.

Answer:

$O_2(g)$: reactant
$SO_2(g)$: reactant
$SO_3(g)$: product
When the reaction takes place, energy is released.