determining viscosity

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America Ramirez 3H
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Joined: Wed Sep 30, 2020 9:44 pm

determining viscosity

Postby America Ramirez 3H » Sun Oct 25, 2020 10:33 pm

How can you determine a liquid has a high viscosity?

Hannah Chang 3E
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Joined: Sat Oct 17, 2020 12:15 am

Re: determining viscosity

Postby Hannah Chang 3E » Sun Oct 25, 2020 11:11 pm

There are different types of viscometers that measure viscosity. You would need to know the flow rate, shear stress, density.....etc in order to calculate.

Susan Chamling 1F
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Re: determining viscosity

Postby Susan Chamling 1F » Sun Nov 01, 2020 11:57 pm

There are multiple methods to measuring a liquid's viscosity, such as measuring the rate at which it flows through a narrow tube. The more viscous the liquid the slower it will flow.

Andrew Wang 1G
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Re: determining viscosity

Postby Andrew Wang 1G » Thu Nov 12, 2020 12:24 pm

From Dr. Lavelle's most recent lecture, we can determine how viscous a substance is compared to another by analyzing their IMFs. The stronger IMF's something has, the more viscous it will be.

Alejandro Gonzalez 2G
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Re: determining viscosity

Postby Alejandro Gonzalez 2G » Sun Nov 22, 2020 11:28 pm

I think one way you can determine viscosity is by looking at things like the flow rate (putting it through a viscometer to determine how fast or slow it flows through a tube).

Hasmik Dis 2F
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Re: determining viscosity

Postby Hasmik Dis 2F » Sun Nov 22, 2020 11:34 pm

Another tip with viscosity is to compare water and syrup ( I feel that real examples help more). Water of course flows more easily, but syrup has a thicker consistency so it doesn’t flow as smoothly. Syrup is thus more viscous.

Natalie 2F
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Re: determining viscosity

Postby Natalie 2F » Sun Nov 22, 2020 11:36 pm

Without doing an experiment, you can compare viscosities by looking at the IMF's of the substances. If a substance has high IMF's they will be closer together and more viscous. If it has low IMF's, the molecules won't be as attracted to each other and farther apart, so it will be less viscous.

Vanshika Bhushan 3A
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Re: determining viscosity

Postby Vanshika Bhushan 3A » Tue Nov 24, 2020 1:34 pm

Liquids that flow slowly have high viscosities and liquids that flow readily have low viscosities. Liquids whose molecules are polar are usually more viscous than similar nonpolar substances. Liquids with long molecules are invariably very viscous. The viscosity of a liquid decreases as temperature increases.

Caelin Brenninkmeijer 1H
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Re: determining viscosity

Postby Caelin Brenninkmeijer 1H » Tue Nov 24, 2020 2:01 pm

Conceptually, you can determine how high a liquid viscosity is by noticing how easily the substance moves. If it moves slower, you know it has a higher viscosity compared to something that moves relatively easy, like water.

Crystal Hsueh 2I
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Re: determining viscosity

Postby Crystal Hsueh 2I » Tue Nov 24, 2020 5:26 pm

I'm sure there are a plethora of ways to determine viscosity but in terms of bonds, the stronger the bonds of a liquid, the higher its viscosity.

TrishaP_3E
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Joined: Wed Sep 30, 2020 9:58 pm

Re: determining viscosity

Postby TrishaP_3E » Tue Nov 24, 2020 6:44 pm

Yeah I think a general rule is stronger IM forces= higher viscosity. I kind of think of it as the fact that stronger IM forces means that the liquid is closer to being solid and viscous liquids are quite thick and close to solid.

derickngo2k
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Re: determining viscosit

Postby derickngo2k » Tue Nov 24, 2020 7:52 pm

This depends on the intermolecular forces or IMFs.


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