Chemistry S1.1.2 | Free Chemistry Video | RevisionDojo
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Chemistry S1.1.2
Learn Chemistry S1.1.2 in this free IB Chemistry video lesson for S1.1.2 The Kinetic Molecular Theory.
About this video
Learn Chemistry S1.1.2 in this free IB Chemistry video lesson for S1.1.2 The Kinetic Molecular Theory.
Summary of the Video
The video explores Structure 1.1.2, focusing on the Kinetic Molecular Theory (KMT) and the properties of solids, liquids, and gases. It explains that all substances are made of particles in constant motion, with elastic collisions and kinetic energy proportional to temperature. The arrangement and behavior of particles in solids, liquids, and gases are compared, highlighting their ability to flow, compressibility, shape, and volume.
Key changes of state are discussed, including:
Melting (s→l)
Evaporation/Boiling (l→g)
Condensation (g)
Video transcript
00:00In this video we look
00:01at structure 1 .1 .2
00:04which includes a quick look
00:05at the kinetic molecular theory
00:07of solids, liquids and gases.
00:09We look at the states
00:10of matter, we look at
00:12the use of state symbols
00:13and also the changes of
00:15state. So we'll start by
00:18looking at the particle models
00:19of a solid liquid and
00:20gas. So from left to
00:22right we have a solid
00:23
→
l
Freezing (l→s)
Sublimation (s→g)
Deposition (g→s)
The video also introduces state symbols used in chemical reactions and physical processes:
(s) for solid, (l) for liquid, (g) for gas, and (aq) for aqueous solutions. Examples include reactions like sodium with chlorine and methane with oxygen, as well as physical processes like melting and sublimation.
in the middle we have
00:25our liquid and on the
00:27right we
00:28have our gas. So according
00:31to the Kinetic Molecular Theory
00:33or the KMT, all substances
00:35are made up of particles.
00:38These particles are in constant
00:40straight line motion. They have
00:42elastic collisions, which means there's
00:44no loss in kinetic energy
00:46when two particles collide. And
00:48the absolute temperature of the
00:50substances is directly proportional to
00:52the kinetic energy of the
00:54particles.
00:56So for a solid, the
00:57particles are all closely packed
00:59together. For liquid, the particles
01:01are still quite close together,
01:03but there's a little bit
01:04of space which shows the
01:06particles are able to move.
01:08And in a gas, we
01:09can see that there's a
01:10lot more space between the
01:11particles. So next we look
01:14at some properties which other
01:15flow can they be compressed,
01:17their shape and their volume.
01:19So solids cannot flow, they
01:21cannot be compressed, they have
01:23a fixed shape,
01:24and a fixed volume. Liquids
01:27can flow but cannot be
01:29compressed. They don't have a
01:31fixed shape instead they take
01:32the same shape as the
01:34bottom of the container that
01:35they're in. But they do
01:37have a fixed volume. Gases
01:39can flow and can be
01:41compressed. They don't have a
01:44fixed shape instead they take
01:45the same shape as the
01:46shape of the container that
01:48they're in, and they don't
01:49have a fixed volume.
01:52Next we look at the
01:53changes of state which are
01:54melting, evaporation and boiling, condensation,