Question

Examine the unbalanced equation.

CH4 + O2 → CO2 + H2O

What is the best classification for the unbalanced equation's reaction, and why?

It is a combustion reaction, because carbon dioxide (CO2) is emitted as a product.
It is a combustion reaction, because oxygen (O2) reacts with a substance.
It is a synthesis reaction, because O2 combines with CH4 to create a new substance.
It is a synthesis reaction, because O2 displaces carbon (C) and hydrogen (H).

Answer 1

it's a combustion reaction because oxygen reacts with a substance

Answer 2

Answer:

The correct answer is: It is a combustion reaction, because oxygen reacts with a substance.

Explanation:

Combustion reaction defined as chemical reaction which hydrocarbon reacts with oxygen molecule to give water, carbon dioxide and heat as a product.

Here in the give reaction methane is undergoing combustion reaction in presence of oxygen to give water and carbon dioxide.The balanced chemical reaction is given as:

$CH_4+2O_2\rightarrow CO_2+2H_2O$

Whereas in synthesis reaction is type of chemical reaction in which two more reactant reacts together to form a single product.

A + D +C → D