15 Questions
How many molecules of carbon dioxide are produced if there are 5 carbon atoms in the hydrocarbon?
Five molecules
Why is it necessary to balance the chemical reaction element-wise during combustion?
To make sure all atoms are accounted for
In the combustion of methane, what is the total energy absorbed for breaking bonds?
2642 kJ
Which type of bond formation releases the highest amount of energy during the combustion of methane?
C=O bonds
Why is the net energy value released during bond formation an approximation?
As a result of using average bond energy values
What is a key difference between complete combustion and incomplete combustion?
Complete combustion takes place in excess of oxygen, while incomplete combustion takes place in a limited quantity of oxygen.
What is bond energy also known as?
Bond enthalpy
Why are fires sometimes extinguished by smothering them with a heavy cloth?
To cut off the supply of oxygen to the fire
In the combustion reaction formula, what are typically the reactants?
Hydrocarbons and oxygen
What is the main reason for the energy released during combustion reactions?
Formation of new bonds between carbon and oxygen
What is the defining feature of a combustion reaction?
Release of water and carbon dioxide
Why doesn't combustion take place all the time at places like gas outlets and campsites?
Need for activation energy to start the reaction
What is the difference between complete and incomplete combustion reactions?
Formation of carbon monoxide in incomplete combustion
Why are hydrocarbons used as fuels for vehicles and cooking?
Because they contain carbon and hydrogen
What is required to break the bonds present in hydrocarbons and oxygen to start a combustion reaction?
Activation energy
Explore the basics of combustion reactions, including how substances burn in oxygen to produce carbon dioxide, water, and energy in the form of heat, light, and sound. Understand the significance of oxygen as a reactant and the exothermic nature of combustion reactions.
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