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. co(g) + 3h₂(g) → ch₄(g) + h₂o(g) + energy. identify each of the following as a product or a reactant: h₂(g) ▼ reactant, ch₄(g) ▼ product, co(g) ▼ reactant, h₂o(g) ▼ product. when the reaction takes place energy is ▼ released. the reaction is ▼ exothermic.

Explanation:

In a chemical reaction, reactants are the starting - materials and products are the substances formed. For an exothermic reaction, energy is released. In the given reaction $CO(g)+3H_2(g)\longrightarrow CH_4(g)+H_2O(g)$, $CO$ and $H_2$ are reactants, while $CH_4$ and $H_2O$ are products. And since it's an exothermic reaction, energy is released.

Answer:

$CO(g)$: reactant
$H_2(g)$: reactant
$CH_4(g)$: product
$H_2O(g)$: product
The reaction is exothermic, so energy is released.