The high-pressure phase diagram of ice is shown here. Notice...

Name: The high-pressure phase diagram of ice is shown here. Notice that, under high pressure, ice can exist in several different solid forms. What three forms of ice are present at the triple point marked O? How does the density of ice II compare to ice I (the familiar form of ice)? Would ice III sink or float in liquid water?
Uploaded: 2021-11-24T22:45:58-08:00
Duration: 6 min 25 s
Channel: Rabia Shuaib
Description: The high-pressure phase diagram of ice is shown here. Notice that, under high pressure, ice can exist in several different solid forms. What three forms of ice are present at the triple point marked O? How does the density of ice II compare to ice I (the familiar form of ice)? Would ice III sink or float in liquid water?

The high-pressure phase diagram of ice is shown here. Notice that, under high pressure, ice can exist in several different solid forms. What three forms of ice are present at the triple point marked O? How does the density of ice II compare to ice I (the familiar form of ice)? Would ice III sink or float in liquid water?

Transcript

0:00 Okay, hello everyone.

00:01 So let's do this chemistry problem here.

00:03 Before i get started, i recommend that you do the question of yourself and come back to see if you got it right or not.

00:10 So hopefully you've done the question of ourselves and all this more connected together.

00:13 So we're given this high pressure phase diagram of ice that i have pulled up here.

00:18 I know it's not the best quality, but it'll do.

00:20 So we can notice that when there's high pressure, the ice can exist in several different forms or shapes.

00:29 So the first part of this question is asking us, what three -fifference? forms of ice are present at the triple point.

00:36 Marked o, so this area here, we want to know what three forms of ice are present at that triple point.

00:47 Well, before we do this, i think you would be helpful to talk about what a triple point exactly is.

00:52 A triple point is a point of the phase diagram.

01:18 All phases exist.

01:21 So that means solid liquid and gas.

01:27 All three phases have a better way.

01:33 All three phases have the present.

01:51 That's a more scientific way to put it.

01:55 Okay, so hopefully that's understandable now.

01:59 When we're looking at the triple point here, obviously people are going to assume that ice two, ice three, and ice five are the three ice forms that exist at the triple point.

02:18 Well, that's a big misconception, and it always leads to mistakes, which is understandable.

02:26 But what we have to notice is that, and as we're told in the question, that under high pressure, ice can exist in several different solid forms.

02:35 So our first, basically our three ice forms are going to be ice three.

02:44 It's like a letter to red ice three, ice one, and liquid water.

02:50 And that's because when we, you can think about it being in three different sections here.

02:55 So this is the first section.

02:58 This is the second section.

03:00 And this is the third section...