Ch.3 - Chemical ReactionsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Combustion analysis is a technique where an organic compound is combusted (exploded!!!) and the products are quantitatively measured. 

Understanding Combustion Analysis

Concept #1: Combustion Analysis Determination 


Now before we tackle this combustion analysis question, it's important for us to identify what exactly is a typical combustion reaction. We're going to say under a combustion reaction, a compound made up of carbon and hydrogen or carbon, hydrogen, and oxygen will react with oxygen gas. Remember, oxygen is a diatomic molecule so it's O2. The product's form would be water and carbon dioxide. So this is your typical combustion reaction.
Now good examples of this we could have CH4 reacting with O2 and we know that the products are going to be water and CO2. All we're going to do here is balance it and there goes our first example of a combustion reaction.
Now CH4 only has carbon and hydrogens. Let's look at one that has carbon, hydrogen, and oxygen that reacts with O2. A good example of this would be glucose, a simple sugar that we use for energy every day. Glucose reacts with atmospheric oxygen, O2, and it too will form water and carbon dioxide, and we balance it.
So these are our two examples of combustion. 

In a combustion reaction an organic compound made of carbon and hydrogen or carbon, hydrogen and oxygen is combusted to form carbon dioxide and water as products. 

Example #1: A 0.2500 g sample contains carbon, hydrogen and oxygen and undergoes complete combustion to produce 0.3664 g of CO2 and 0.1500 g of H2O. What is the empirical formula of the compound?