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A 0.245-L flask contains 0.467 mol $CO_{2}$ at 159 °C. Calculate the pressure:

(a) using the ideal gas law(b) using the van der Waals equation(c) Explain the reason for the difference.(d) Identify which correction (that for P or V) is dominant and why

a) 66.2 $\mathrm{atm}$b) 60.5 $\mathrm{atm}$c) these factors are responsible for the difference in the answers.d) The factor for pressure correction which is used in Vander walls equation is dominant in the case of low pressures. At higher volume of molecules, there will be higher pressure.

01:58

Aadit S.

04:04

Charotte M.

Chemistry 101

Chapter 9

Gases

Nadine S.

September 22, 2020

hi. Thank you for this. on 104 a. you wrote 423 wrong. It should be 432. 159C+ 273= 432K

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I ruined. Let's do this chemistry problem. And before I start to suggest you pause the video. Do the question yourself and then come back to see if you got it right enough. That was truly annoying if you fully understand. So let's start with what we're given. Were given a volume Which is your 20 to 45 years. We are given more So 2.467. Move we are given the temperature. Mhm. And it is the mole for syria to so So the mole is for cr two at 159°C. So we want to use this with an eye, the ideal gas law equation. So I think we should write it out first baby where P is pressure. These volume and moles are as a constant and T. Is temperature. So we want to calculate the pressure. So let's make P. The subject change it. Well here it goes and are divided. Like you maybe just move the V. And you should have P. As the subject and the continent there are different are constants. But the one that we're going to use today is it's all because of the units We have we want pressure and uh this our country has pressure in the units. The other are constant. Which people are most familiar with which is 8.314. Um has jewels and role in it. Which we don't want the regime one. So now we can solve by just substitute substituting in the values so. Yeah. Yeah. Yeah. Whoa. Mhm. 08 Yeah. Mhm. Oh we need to convert the temperature. Almost forgot about that because as you can see from the corrosion Calvin but in the question that gave us in degrees Celsius. So what we need to do to convert it over at least 59273 That should give you 432. Count is it a popular or mental math and figure that out. Um Did you get us t into the equation given the if the volume was given to you and you know leaders you could record in two years. It just has to be leaders now And we can using your calculator you can kind of figure it pressure to be 67.56 atmospheric pressure. And then next we want to use vendor role situation so we can write it out. Yeah. Mhm. Mhm. Yeah. Yeah. Mhm. Yeah. Mhm. Mhm. And P. Is pressure is volume T. Is temperature or is the gas constant? And A. And B. They are rendered walls constant. So we should rearrange the formula so that we can get P. As the subject because we want to figure out pressure. Right so and two please. Mhm. Yeah that's right. and specifically for two defender role constants are, yeah, frequency. Yeah. Yeah. Peter squared mr Oh. And how space for them units? The units are very important. Okay. Yeah. And then Mhm. All right. And then we can simply just plug in everything. Mhm, mm hmm. Yeah. Yeah. Yeah. Yeah. Mhm. And the temperature, You're already half weird to be 4 32 Kelvin. Bye. Thanks. Sure. It's confusing. It should be completely admires. So you would drive that jesus 12-4 5 leaders and who knows? Yeah. Yeah. Uh huh. Times the constant. Yeah. Mm hmm. Yeah. And then minus all of them. Yeah, 1826. Mhm. Yeah. Okay. More and obviously we need to square that running out of space here for by leaders. And then you just square that as well. And using a calculator leader, you should put to me to be 60 points. I already calculated before. And this is what I call So why are there? Why are the values different? Right. So we got pressure uh using the vulnerable equation as 60.32. But when we used um the ideal gas law equation we got 67 points 5 6. Right? So that's what we're getting here. Fresh air or anything. But you re new equations and the pressure. I'm using the ideal restaurant tables. I think this is and we use the ideal gas blocked. The only difference. It's because the ideal gas law of equation is actually used as the name suggests, um surprise, surprise. It's used for ideal gases. Right. Yeah. And the valuable information can be used for both ideal gasses and real guests. So in this example we had Ceo too. So carbon dioxide stop here. Carbon dioxide, which was the gas that is given in this question is a lot I feel grateful or idea gasoline because it has attractive and repulsive forces between the particles. Uh huh. The gas particles and go to have volume of the collisions are not elastic. And, generally speaking, a real gas approaches ideal behavior and high temperatures and low pressures.

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