A rapid exothermic chemical reaction in which a fuel reacts with oxygen gas, releasing large amounts of energy as heat and light.
Burning. When something burns, it's reacting with oxygen and releasing energy as heat and light.
Showing a random 20 of 50 problems.
Example 1
easy
Is O2 always a reactant in combustion?
Example 2
hard
A hydrocarbon produces 4 mol of CO2 and 5 mol of H2O per mol burned. Find its formula.
Example 3
medium
Balance: C3H7OH+O2→CO2+H2O (1-propanol).
Example 4
medium
Balance: C5H12+O2→CO2+H2O (pentane).
Example 5
easy
Balance: C+O2→CO2.
Example 6
hard
Ethanol (C2H5OH) is used as a fuel additive. Write the balanced equation for its complete combustion. If only limited oxygen is available, what products form instead (incomplete combustion)?
Example 7
medium
How many moles of O2 are needed to completely burn 3 mol of propane (C3H8)?
Example 8
medium
How many mol O2 are needed to burn 2 mol CH4 completely?
Example 9
easy
Complete combustion of C2H6 gives which products?
Example 10
easy
Is 2Mg+O2→2MgO a combustion reaction?
Example 11
easy
Balance the combustion of butane: C4H10+O2→CO2+H2O.
Example 12
hard
Burning 0.10 mol of ethanol (C2H5OH) completely gives what mass of CO2 (M = 44 g/mol)?
Example 13
challenge
1.00 mol of an unknown hydrocarbon CxHy requires 6.5 mol O2 for complete combustion. If it forms 4 mol CO2, find x and y.
Example 14
medium
Balance: CH4+O2→CO2+H2O.
Example 15
challenge
Complete combustion of 8.0 g CH4 (M=16) gives what mass of H2O (M=18)?
Example 16
medium
True or false: combustion always involves a flame.
Example 17
easy
What two products form in complete combustion of a hydrocarbon?
Example 18
medium
Balance: C2H4+O2→CO2+H2O (ethene).
Example 19
medium
What gas detector should every home have to warn against incomplete combustion?