Question

in addition to ash, what is produced when wood burns?
a carbon dioxide and water vapor
b oxygen, carbon dioxide, and water vapor
c oxygen and carbon dioxide
d oxygen and water vapor

Explanation:

Wood is mainly composed of carbon, hydrogen, and oxygen. When wood burns (a combustion reaction), it reacts with oxygen (\(O_2\)). The general chemical reaction for the combustion of a hydrocarbon (which wood can be approximated as containing hydrocarbons) is \(C_xH_y+(x + \frac{y}{4})O_2
ightarrow xCO_2+\frac{y}{2}H_2O\). Ash is the non - combustible residue. Oxygen is a reactant (it is consumed in the combustion reaction, not produced). Carbon dioxide (\(CO_2\)) and water vapor (\(H_2O\) in gaseous form) are produced as products of the combustion reaction.

Answer:

A. carbon dioxide and water vapor