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Temperature - Pressure

  • Thread starter ar202
  • Start date
  • #1
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Homework Statement



A cylinder of nitrogen is pressurised to 200 BAR at 25oC
The cylinder is left to cool outside on a winters day to –5oC

What is the pressure of the Nitrogen once it has cooled?



Homework Equations



P1/T1=P2/T2 ?


The Attempt at a Solution



25+273 = 298 Kelvin. 273-5=268 Kelvin.

200/298=0.6711409396

0.6711409396 x 268 = 179 BAR ?

Have i used the relevant equation? Going through some practice questions but cant find the solutions. doh.

cheers
 

Answers and Replies

  • #2
mgb_phys
Science Advisor
Homework Helper
7,774
12
You would normally just do
200 * 268/298 = 180Bar

Yes you are correct.
 

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