What are the main properties of solids (in contrast to liquids and gases)?

Name: Problem 4, Chapter 11: Chemistry A Molecular Approach
Uploaded: 2019-07-04T01:40:03-08:00
Duration: 4 min 28 s
Channel: Ryan Daly
Description: What are the main properties of solids (in contrast to liquids and gases)?

step 1 Okay, this is 4 in Chapter 11. Okay, so what are the properties of solids as opposed to liquids

What are the main properties of solids (in contrast to...

Key Concepts

Surface Tension

Surface tension is a property that arises from the cohesive forces between liquid molecules at the surface, causing the surface to behave like a stretched elastic membrane. This is responsible for phenomena such as the formation of droplets and the ability of some objects to float on the liquid surface, and it is a distinctive trait of liquids.

Viscosity

Viscosity is the measure of a liquid’s resistance to flow. It is influenced by the strength of intermolecular forces within the liquid, with higher viscosity indicating stronger interactions and slower movement. This concept is key to understanding how liquids behave under different conditions, such as in laminar or turbulent flow.

Incompressibility

Due to the close proximity of molecules in a liquid, liquids are nearly incompressible. This means that applying pressure changes the volume only marginally, unlike gases, whose volumes can change significantly under pressure due to the larger spaces between molecules.

Fluidity

The molecules in liquids can move past one another relatively easily, which allows liquids to flow. This fluidity distinguishes them from solids, which maintain a rigid structure, and contrasts with gases which are also fluid but less densely packed.

Indefinite Shape

Liquids do not have a fixed shape and instead take on the shape of their container. While the volume remains constant, the boundaries of a liquid's form are determined by the container's geometry and the influence of gravity, which distinguishes liquids from solids with fixed shapes.

Definite Volume

Liquids have a definite volume, meaning that the quantity of matter remains constant regardless of the container, unlike gases that can expand to fill their containers. This property arises because the molecules in a liquid are closely packed, maintaining a fixed volume under ordinary conditions.

Transcript

00:11 Okay, this is 4 in chapter 11.

00:22 Okay, so what are the properties of solids as opposed to liquids and gases? well, most solids, first of all, you should think of as having an ordered structure.

00:36 You could have solids, which have kind of a square grid structure in three -dimensional space.

00:43 And if you imagine how this compares to liquids and gases, you'll end up.

00:51 Up seeing something slightly different obviously.

00:54 So in a liquid you would have relatively close together atoms and molecules just be like a liquid.

01:09 This would be solid.

01:13 And then you would have gases which are quite a bit further apart, much, much, very, very much less dense.

01:24 So this would be a gas.

01:27 So real question is, what are the properties of solids that you have to think about to distinguish between one solid and another solid, perhaps even of the same type, the same molecule? what would you have to do know about the solid in order to know what we're talking about, what state the system's in? well, in a liquid, the molecules can slosh around, and they're generally pretty amorphous in configuration.

01:58 And the same goes for gases.

01:59 So gases and liquids, they have temperature just like everything does.

02:06 Solid has temperature, and they all have actually have pressure.

02:12 More that means for liquids and solids, i'm sure in later chapters...

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