Hello intelligent peopleI need a little help8 liter of air

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Discussion Overview

The discussion revolves around calculating the volume of air when compressed from an initial volume of 8 liters at ambient pressure to a pressure of 8.2 bar. Participants explore the application of the ideal gas law and clarify misunderstandings regarding the nature of volume change under compression.

Discussion Character

  • Technical explanation
  • Homework-related
  • Debate/contested

Main Points Raised

  • One participant suggests using the ideal gas law (PV=nRT) to determine the new volume, assuming temperature remains constant and that the number of moles and the gas constant are unchanged.
  • Another participant seeks clarification on the calculation, specifically asking how the volume changes when compressing the air from 8 liters at 1 psi to 8.2 bar.
  • A third participant expresses confusion, interpreting the initial response as indicating an increase in volume rather than a decrease due to compression.
  • Subsequent comments highlight the misunderstanding and emphasize the need to correctly interpret the volume change resulting from increased pressure.

Areas of Agreement / Disagreement

Participants exhibit some confusion regarding the initial explanation and the nature of the volume change. There is no consensus on the calculation method, and misunderstandings are clarified through further discussion.

Contextual Notes

Participants rely on the ideal gas law but do not fully resolve the mathematical steps involved in the calculation of the new volume under compression.

Who May Find This Useful

Individuals interested in gas laws, pressure-volume relationships, or those seeking assistance with related physics or engineering problems may find this discussion relevant.

blinki069@yah
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hello intelligent people

I need a little help
8 liter of air volume, ambient temp, then compressed at 8.2 bar = volume in cu cm?

thank you for your help...metric or US... volume would be 2.11 gl @ 120 psi keep it simple please
stef
 
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PV=nRT approximately. I suppose T remains constant, n and R are constants. Thus if you go from 1 bar to 8.2 bar, then volume goes from 8 liters to 8/8.2 liters... Multiply by 1000 to get it in cm cubes.
 


petr
thank you for your kind reply
maybe I was not clear I want to compress the 8 L(@ 1 psi) volume with 8.2 bar and want to know how much that volume will shrink to in cu cm
 


Didn't Petr Mugver practically gave you the answer already? Or did you not understand what you were given?

Zz.
 


propably did not understand it :(
I read as if he increased the volume...I want to decrease the volume by pressurizing it
sorry
s
 


blinki069@yah said:
I read as if he increased the volume...
Read it one more time.
 


I got it now thank you all!
S
 

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