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Description:
AP Chemistry 2.5 Structure and Arrangement of Atoms. Under which of the following conditions would a real gas behave more like an ideal gas?
Transcript
- 00:00
Thank you We sneak Here's your smoke do sure brought
- 00:05
to you by ideal gases if they're not ideal maybe
- 00:09
it's just a phase they're gone through and you know
- 00:11
get better over time Here's our question under which of
- 00:14
the following conditions what a real gas behave more like
Full Transcript
- 00:16
an ideal gas And here are potential answers All right
- 00:20
Well if all our ideal circumstances came true we'd ride
- 00:23
our unicorn to work as a professional nap taker and
- 00:26
collect our six figure salary at the end of the
- 00:28
day But the hard truth is ideal Circumstances are rarely
- 00:31
reality It's true in our dreams of unicorn transportation and
- 00:35
it's especially true in chemistry and ideal gas is one
- 00:38
that behaves in a predictable mathematical fashion when the temperature
- 00:40
pressure amount of gas or volume of gas changes following
- 00:44
what is called the ideal gas law pressure times volume
- 00:47
equals number of moles times a calculated gas constant our
- 00:50
times the temperature So what makes the ideal gas law
- 00:53
fail in reality forces of attraction between gas molecules When
- 00:58
gas molecules are attracted to each other they spent too
- 01:01
much time together and don't move around as much making
- 01:03
their behaviour less ideal Forces of attraction between gas molecules
- 01:08
are short range so the farther apart molecules are the
- 01:11
less powerful these forces are And if gas molecules are
- 01:14
moving around quickly they'll whiz by each other instead of
- 01:17
spending time together in giving those forces of attraction timeto
- 01:20
work in order for our molecules to be well behaved
- 01:23
we want them to have fewer forces of attraction between
- 01:26
them which means we want them to be far apart
- 01:29
and moving fast This means that the question is actually
- 01:32
asking us under which conditions will gas molecules be far
- 01:36
apart and moving fast So what does that question mean
- 01:40
by conditions Well all of the answers given pressure and
- 01:43
atmospheres and a temperature And kelvin so we know our
- 01:46
conditions will have something to do with those measurements More
- 01:49
pressure means that the molecules will be forced closer together
- 01:52
So we want a low pressure to keep them apart
- 01:55
Temperature is the average kinetic energy of the gas molecules
- 01:59
So ah hi Temperature means they have more energy and
- 02:02
will be moving faster which is what we want Well
- 02:04
answer D has the lowest pressure and the highest temperature
- 02:07
Which means it's the answer We want yeah yes it's
- 02:11
Not a terrible job to solve chemistry problems but well 00:02:14.643 --> [endTime] we'll take that professional knocker position any day
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