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Ibuprofen is used as an anti-inflammatory agent used to deal with pain and bring down fevers. If it has a molecular formula of C13H18O2, determine the balanced combustion reaction when it is subjected to high temperatures.
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7. Chemical Reactions
Types of Chemical Reactions
1:45 minutesProblem 29
Textbook Question
Glucose, also known as 'blood sugar' when measured in blood, has the formula C6H12O6.Write the equation for the combustion of glucose with O2 to give CO2 and H2O.
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Identify the reactants and products in the combustion reaction. The reactants are glucose \( \text{C}_6\text{H}_{12}\text{O}_6 \) and oxygen \( \text{O}_2 \). The products are carbon dioxide \( \text{CO}_2 \) and water \( \text{H}_2\text{O} \).
Write the unbalanced chemical equation for the combustion of glucose: \( \text{C}_6\text{H}_{12}\text{O}_6 + \text{O}_2 \rightarrow \text{CO}_2 + \text{H}_2\text{O} \).
Balance the carbon atoms. There are 6 carbon atoms in glucose, so you need 6 \( \text{CO}_2 \) molecules on the product side: \( \text{C}_6\text{H}_{12}\text{O}_6 + \text{O}_2 \rightarrow 6\text{CO}_2 + \text{H}_2\text{O} \).
Balance the hydrogen atoms. There are 12 hydrogen atoms in glucose, so you need 6 \( \text{H}_2\text{O} \) molecules on the product side: \( \text{C}_6\text{H}_{12}\text{O}_6 + \text{O}_2 \rightarrow 6\text{CO}_2 + 6\text{H}_2\text{O} \).
Balance the oxygen atoms. Count the total oxygen atoms on the product side (6 \( \text{CO}_2 \) gives 12 oxygen atoms and 6 \( \text{H}_2\text{O} \) gives 6 oxygen atoms, totaling 18). Since glucose already has 6 oxygen atoms, you need 12 more from \( \text{O}_2 \), which means 6 \( \text{O}_2 \) molecules: \( \text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2 \rightarrow 6\text{CO}_2 + 6\text{H}_2\text{O} \).
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1mKey Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Combustion Reaction
A combustion reaction is a chemical process in which a substance reacts rapidly with oxygen, producing heat and light. In organic compounds like glucose, combustion typically results in the formation of carbon dioxide (CO2) and water (H2O). This type of reaction is exothermic, meaning it releases energy, which is why it is commonly used in energy production.
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Balancing Chemical Equations
Balancing chemical equations is essential to ensure that the number of atoms of each element is conserved during a reaction. In the case of glucose combustion, the equation must reflect that the total number of carbon, hydrogen, and oxygen atoms on the reactant side equals those on the product side. This is achieved by adjusting the coefficients in front of the chemical formulas.
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Molecular Formula of Glucose
The molecular formula of glucose, C6H12O6, indicates that each molecule contains six carbon atoms, twelve hydrogen atoms, and six oxygen atoms. Understanding this formula is crucial for writing the combustion equation, as it provides the starting point for determining the products and balancing the reaction. The structure of glucose also influences how it reacts with oxygen during combustion.
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