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4.1 Climate Change and the Combustion of
Water is formed by the reaction of hydrogen and oxygen.
The reactions emit heat.
Our society's energy needs are dependent on the heat produced in a number of combustion reactions.
The heat from the combustion of gasoline expands the products in a car engine's cylinders, which push the pistons and propel the car.
We can spot a problem if we look closely.
There are two oxygen atoms on the left side of the equation.
The law of mass is violated when an oxygen atom forms out of nothing.
The right side has two hydrogen atoms, while the left side has four.
Two hydrogen atoms have vanished.
New atoms don't form during a molecule of the substance.
Symmetric matter must be used for reaction and not disappear.
We put the coefficient 2 before the O compound to balance the equation for the combustion of methane.
The equation is balanced because the numbers of each type of atom on the other side are the same.
One CH4 molecule reacts with two O2 molecule to form one CO2 molecule and two H2O molecule according to the balanced equation.
We use the number of each type of atom on each side of the equation to verify that the equation is balanced.
The equation is balanced because the number of each type of atom on both sides is equal.
By trial and error, we can balance many chemical equations.
Some guidelines are useful.
The process can be shortened by balancing the atoms in the most complex substances first and the atoms in the simplest substances last.
The examples of how to balance chemical equations are presented in a two- or three-column format.
The general procedure is shown on the left, while the application of the procedure is on the right.
A flexible guide is what this procedure is meant to be.
Write a balanced equation for the reac, which is a mixture of a fuel solid carbon and a gas called C4H10 which is used in portable stoves and grills.
To balance O, put a 2 before C and a 4 before CO elements.
13 O atoms coefficients are 8 O + 5 O.
The equation is balanced.
The equation is in balance.
A balanced equation is needed for the reaction between solid carbon, carbon dioxide, and C2H6 to produce a minority component of natural gas.
Write a balanced equation for the reaction between strontium chloride and strontium sulfate to form solid strontium sulfate and strontium sulfate.
Refer to Sections 3.5 and 3.6 for naming rules.
The balance for Li + was thrown off in the previous step.
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