daltons law of partial pressure will be
easily explained in this video with animation let's say we have a container
with three different gases gas one gas two and gas three note that the gases
are all inside the same container this means that they all have the same volume
now let's take the same container and spread the gases out equally while
holding the volume constant in each container the sum of the partial
pressures of the three gases will equal the total pressure of the mixture of
gases let's look at the pressure meters above the gas chambers to notice that
each partial pressure of the individual gases equals the pressure of all the
gases in the same container now let's look at the formula for dalton's law of
partial pressure first let's derive the ideal gas law where pressure times
volume equals NRT we can see that the pressure is equal to NRT over V now
let's look at dalton's law of partial pressure we're at a constant volume we
can add the partial pressure volumes of the individual gases to equal the total
pressure of the combined gases let's do a sample question here a gas mixture
contains hydrogen helium neon and argon the total pressure of the mixture is
ninety three point six kiloPascals the partial pressures of helium neon and
argon are fifteen point four kilo Pascal's twenty four point seven kPa and
thirty five point six kPa respectively what is the pressure extended by
hydrogen so we know that the total pressure is equal to ninety three point
six kiloPascals of pressure and we have the pressures of the other three gases
in the mixture we also know that all the units are the same and we don't have to
do any mole conversions so all we need to do is add up the three individual
pressures and subtract them from the total to get the pressure of hydrogen
which is sixteen point nine kilo Pascal's this question uses daltons law
of partial pressures perfectly thanks for watching we hope you found
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