[Kenichi22]

Okay so I have a few questions for my test tomorrow, but the main type are the following:

(These are all the same kind so if you answer one I'll probably get the rest)

1) A sample of krypton gas at 3.50 atm is heated from 20 degrees C to 150 degrees C. If the volume remains constant, what is the final pressure? (I don't get it, I don't see a volume to begin with?)

(answer: 5.05 atm)

2) The pressure of sulfur trioxide gas at 25 degrees C increases from .0500 atm to 1.00 atm. What is the final Celsius temperature if the volume remains constant? (I don't get it, I don't see a volume to begin with?)

(answer: 323 degrees C)

3)The pressure of an air sample at 190 K increases from 415 mm to 830 mm Hg. What is the final Kelvin temperature if the volume remains constant? (I don't get it, I don't see a volume to begin with?)

(answer: 380 K)

4) A sample of air at 7.50 atm is cooled from 448k to 224k. If the volume remains constant, what is the final pressure? (I don't get it, I don't see a volume to begin with?)

(answer: 3.75 atm)

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And the other type of problem I need answered is:
Nevermind I got it =)

[aldoxime_amine]

1) Can you write down the ideal gas equation for both situations, considering an arbitrary volume?

[Lone Proton]

All you do is a proportion using 273 kelvin...
Starts out at 20 degrees Celsius so..

Also remember the psi, mm hg, and atm conversions
if i'm right, it is...

14.7psi
760 mm hg
1 atm

Use those for the rest of the problems


3.5 atmospheric pressure                     equals....        X atmospheric pressure
----------------------------                                           --------------------------
293 kelvin (273 + 20)                          equals....       423 Kelvin (273 + 150)




I hope i helped

[kuwkuw]

) A sample of krypton gas at 3.50 atm is heated from 20 degrees C to 150 degrees C. If the volume remains constant, what is the final pressure? (I don't get it, I don't see a volume to begin with?)


P1/T1=P2/T2

P1 = 3.50
T1= 20 C+273 =  K
T2 = 150 C+273 =  K

from the equation you can calculate P2


(answer: 5.05 atm)

2) The pressure of sulfur trioxide gas at 25 degrees C increases from .0500 atm to 1.00 atm. What is the final Celsius temperature if the volume remains constant? (I don't get it, I don't see a volume to begin with?)

P1/T1=P2/T2

P1 = 0.5 atm
p2 = 1 atm
T1 = 25 C
T2 = ?? << missing


(answer: 323 degrees C)

3)The pressure of an air sample at 190 K increases from 415 mm to 830 mm Hg. What is the final Kelvin temperature if the volume remains constant? (I don't get it, I don't see a volume to begin with?)




(answer: 380 K)

4) A sample of air at 7.50 atm is cooled from 448k to 224k. If the volume remains constant, what is the final pressure? (I don't get it, I don't see a volume to begin with?)

(answer: 3.75 atm)