(a) When a compound containing C, H, and O is completely combusted in air, what reactant besides

(a) When a compound containing C, H, and O is completely...

(a) When a compound containing $\mathrm{C}, \mathrm{H},$ and $\mathrm{O}$ is completely combusted in air, what reactant besides the hydrocarbon is involved in the reaction? (b) What products form in this reaction? (c) What is the sum of the coefficients in the balanced chemical equation for the combustion of one mole of acetone, $\mathrm{C}_{3} \mathrm{H}_{6} \mathrm{O}(l),$ in air?

Key Concepts

Stoichiometry and Balanced Chemical Equations

Stoichiometry involves determining the correctly balanced chemical equation that obeys the conservation of mass. For combustion reactions, this means adjusting the coefficients so that the number of atoms of each element is the same on both sides of the reaction. Calculating the sum of coefficients, as in the combustion of one mole of acetone (C3H6O), helps verify the proper balance of the reaction and provides insight into the overall reaction scale.

Products of Combustion

The products formed during complete combustion of organic compounds are primarily carbon dioxide (CO2) and water (H2O). These products result from the full oxidation of the carbon and hydrogen atoms in the fuel molecule, ensuring that the reaction is both efficient and exothermic.

Oxygen

Oxygen is the key reactant in combustion reactions besides the fuel. In air, oxygen (O2) is the component that reacts with the compound containing carbon, hydrogen, and oxygen. It is critical for the oxidation process that leads to the formation of the combustion products, such as carbon dioxide and water.

Combustion Reaction

A combustion reaction is a chemical process in which a substance (often an organic compound) reacts rapidly with oxygen to produce heat and light. In the context of organic compounds, complete combustion typically produces carbon dioxide and water, meaning all the carbon is oxidized completely and hydrogen fully reacts with oxygen.

Transcript

00:01 Okay, so if we consider the formula for the hydrocarbon given here as cx, h -y -o -z, then our first question here is what is the other reactant for the combustion of this hydrocarbon? so a combustion reaction means the reaction with oxygen.

00:34 That means in a combustion reaction, one reactant will be always oxygen gas.

00:41 So our answer to our first question, the other reactant here in this combustion reaction is oxygen.

00:48 Now our second question is what will be the product in this combustion reaction? so here we also have to also to remember that in a combustion reaction the products are always carbon dioxide gas and water vapor these are the constant products for all the combustion reaction so whatever the hydrocarbon is if the reactant is reacting with oxygen the products will be always carbon dioxide and hydrogen so our answer to our second question is co2 gas and h2o in the vapor form or the g form.

01:45 Now our third question is we have to write a balanced chemical equation for the combustion of acetone which has a formula of c3h6o should be in liquid form it will react with oxygen gas in the combustion reaction to produce co2 plus h2o.

02:19 Now to balance this reaction equation, first we write down our each space is present in both sides.

02:37 So first we will balance the number of carbons, then we'll balance the number of hydrogen and then the number of oxygen.

02:46 So let's start with the carbon.

02:48 We have three carbon in the reactant sign.

02:51 And we have one carbon in the product side.

02:56 We have six hydrogen in the reactor sign and we have two hydrogen in the product side.

03:04 Then we have one plus two, three oxygen in the reactor side...

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