Calculate pressure in temperature changes

Click For Summary

Discussion Overview

The discussion revolves around calculating the pressure exerted by helium in a balloon under specific conditions, including changes in temperature and altitude. The context includes a take-home test scenario involving gas laws and ideal gas behavior.

Discussion Character

  • Homework-related, Mathematical reasoning

Main Points Raised

  • One participant presents a problem involving a toy balloon filled with helium, seeking help to calculate the pressure at a specific altitude and temperature.
  • Another participant suggests using the ideal gas equation, PV=nRT, and advises converting temperature from Fahrenheit to Kelvin, volume from cm³ to liters, and mass from grams to moles.
  • A subsequent reply corrects the temperature conversion, clarifying that it should be from Fahrenheit to Kelvin rather than Celsius.
  • A later response expresses gratitude for the assistance received and indicates that the suggested approach led to a correct answer.

Areas of Agreement / Disagreement

Participants generally agree on the use of the ideal gas law for the calculation, but there is no consensus on the specifics of the temperature conversion process.

Contextual Notes

Limitations include the assumptions made about the behavior of helium as an ideal gas and the need for proper unit conversions, which are not fully detailed in the discussion.

Who May Find This Useful

Students working on gas law problems, particularly those involving calculations of pressure, volume, and temperature changes in gases.

fran2000
Messages
2
Reaction score
0
A toy balloon if filled with 0.150 grams of hellium and ocupied a valume of 4250.0 Cm3. It rises 2500 miters above the street where temperature is 23 degrees F. Calculate the pressure that the hellium exert inside the balloon at this altitud.

Please anyone who can help me. I thing I have to use the pressure formula or the combine formula. Not sure.. Anyone please I have to turn in my take home test today at 10:00 am.
 
Chemistry news on Phys.org
If you assume that the helium behaves as an ideal gas you can use the ideal gas equation, PV=nRT. Just convert F to C, Vol to L, g to mol. Plug and chug.
 
sorry not F to C, but F to Kelvins
 
Thanks gravenewworld, Many thanks to you.

I apreciate the help and I hope that the Lord bless you with many good things. Your suggestion was perfect and the anwer I came up with was right. Thanks a bunch..
 

Similar threads

Replies
1
Views
2K
Replies
1
Views
2K
  • · Replies 3 ·
Replies
3
Views
5K
Replies
19
Views
2K
  • · Replies 1 ·
Replies
1
Views
4K
  • · Replies 8 ·
Replies
8
Views
12K
  • · Replies 2 ·
Replies
2
Views
3K
Replies
4
Views
6K
  • · Replies 4 ·
Replies
4
Views
5K
  • · Replies 6 ·
Replies
6
Views
5K