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AP Chemistry 3.5 Structure and Arrangement of Atoms 55 Views


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AP Chemistry 3.5 Structure and Arrangement of Atoms. Which of the following is true regarding solids?

Language:
English Language

Transcript

00:03

Here’s your Shmoop du jour, brought to you by medicinal chemistry.

00:07

If you can’t helium, and you can’t curium, you’ll just have to barium [Two guys on a table entertaining people in a restaurant]

00:11

Here’s our question…

00:16

Which of the following is true regarding solids?

00:18

And here are our potential answers…

00:25

Let's start at the top with (A).

00:27

(A) just means that all the stuff in a solid is in a very small space.

00:31

Does that seem true?

00:32

Well, if you’ve ever vaporized anything in the microwave, let’s say a grape, you [A microwave and a bunch of grapes appear]

00:36

probably know that if you put a solid object in and heat it to make a gas or a plasma,

00:41

it will often expand to fill the microwave. [Microwave explodes and grapes hit a man in the face]

00:44

Not that…we've tried this before….ahem.

00:48

Anyway, it seems like A might be a reasonable choice, so we'll come back to it. [Car drives down a road]

00:52

The next answer says that solids have the highest average kinetic energy relative to

00:56

liquids and gases.

00:58

Average kinetic energy is what temperature measures. [Thermometer gauge rising]

01:00

A high temperature means a high average kinetic energy, and a low temperature means a low

01:05

average kinetic energy.

01:06

This means the question is actually asking us if solids are generally hotter than liquids [A log of wood, rain and gas]

01:11

and gases.

01:12

Although having gas is not hot when you’re on a date, gases themselves are the hottest [Man farts walking through a park with a girl]

01:16

state of matter on average.

01:18

Temperature-wise.

01:19

We don’t know how they fare in online dating… [Mobile phone with a Tinder picture of a gas]

01:22

Solids are colder than both liquids and gases in fact, so we can cross off choice B right away.

01:28

Let’s move on to answer C, which says that the particles are in a randomly assorted 3D

01:33

structure, brought to you by Oculus [An oculus rift AI headset]

01:35

As much as your Lego kit at home may be in disarray, the atoms within each Lego piece [Boy surrounded by lego pieces]

01:40

should be arranged fairly regularly compared to a liquid or a gas….unless you’ve run

01:45

your Legos through a particle accelerator. [Pieces of lego shooting through a particle accelerator]

01:47

Maybe you have, maybe you haven’t.

01:49

…Don't try that at home either.

01:51

So answer C is off the table.

01:53

Moving on to answer D. [Car drives past a sign labelled 'D']

01:55

This next statement says that solids have a definite volume from an indefinite shape.

02:00

If you take a sugar cube as an example, you can see that a solid has a very definite volume

02:04

as well as a definite shape. [A sugar cube in a kitchen]

02:05

if you pound the cube into dust, it still has a definite shape. [Hammer smashes sugar cube to dust]

02:10

It’s just gone from a cube to an amorphous pile of dust that has no geometric name.

02:16

So answer D is off the table because indefinite shape does not describe solids.

02:20

That leaves us with our original answer A, that solids constitute a condensed state of

02:24

matter.

02:25

So it looks like nothing was the matter with answer A… [Guys cheering in a pub]

02:29

…We'll see ourselves out.

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