Expanding gases and temperatures

Expanding gases and temperatures

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xRIEx

Original Poster:

8,180 posts

154 months

Monday 11th April 2016
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I remember small amounts my GCSE and A-Level physics education, and know roughly that gases cool as they expand. So if compressed air from, say, a 200 bar cylinder vents to atmosphere it's going to get colder. How can I work out how much colder it will get? How about when filling a tyre?

Do I need to use P1.V1/T1 = P2.V2/T2? (Which is about all I can remember from my school days.)

xRIEx

Original Poster:

8,180 posts

154 months

Monday 11th April 2016
quotequote all
It's sounding a bit complicated for me now! I think I'll categorise this as "rocket science without the combustion" hehe

xRIEx

Original Poster:

8,180 posts

154 months

Wednesday 13th April 2016
quotequote all
Cheers all, I'll get my learning cap on thumbup