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AP Physics 2 Videos 66 videos

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AP Physics 2: 1.2 Probability and Systems 172 Views


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AP Physics 2: 1.2 Probability and Systems. What is the volume of the balloon when cooled with liquid nitrogen?

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Transcript

00:00

Thank you We sneak and here's your shmoop du jour

00:05

brought to you by liquid nitrogen which is great for

00:08

all sorts of physics thing Quit Well not so great

00:10

My swimming pool here's Your question assumed that the helium

00:15

in the balloon behaves is an ideal gas and the

00:18

pressure remains constant that the balloon occupies one leader of

00:22

volume at room temperature what's its volume when cooled by

00:26

the liquid nitrogen and hear the financial answer I'm leaving

00:33

This experiment calls for the ideal gas law thiss law

00:36

explains how an ideal gas will act We assume that

00:39

being ideal in all it'll keep its room clean and

00:42

always be polite No wait That's not right And i

00:44

feel guest is a hypothetical gas that will always act

00:47

predictably Formula for an ideal gas law is pv equals

00:51

and katie this thing in this glacier p is pressure

00:55

be is volume and is the number of molecules Hey

00:58

sabi is bosman's constant and he is the temperature in

01:02

kelvin because it's the coolest Okay now that we have

01:07

that jan di door brains let's take another look at

01:09

our experiment Remember we're dropping a bullet gets a liquid

01:12

nitrogen because that's our idea of fun on a friday

01:15

night judges the balloon is sealed so the amount of

01:18

particles and pressure remain the same And remember we're trying

01:21

to figure out how the change in temperature effects the

01:23

change in volume Let's look at the two equations from

01:26

different volumes Since we're solving for volume we'll just rearrange

01:29

the equations by dividing both sides By p we could

01:33

dividing rearrange the equations canceling out everything but the volumes

01:36

And the temps visa two equals t's up to over

01:39

t someone times visa of one lycan in the Numbers

01:42

We have 77 degrees kelvin over three hundred reason calvin

01:45

times one leader which means the volume is about equal

01:49

to a point two five leaders and that makes me

01:51

the correct answer Well so there we have it Now

01:55

we can go fun playing around with liquid nitrogen and

01:58

just remember to wear gloves No one wants to end 00:02:00.643 --> [endTime] up with a hand sickle Well

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