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Gas Volume, changing temperature


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mytqik



Joined: 26 Jun 2004
Posts: 127


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Gas Volume, changing temperature

Brett,

You can delete this if you deem it too far off topic, BUT

I am stuck. I need to know how to work out the volume of air after changing the temperature with a contant pressure ie:

V = 715780m3, T = 450 C, P = 101kpa
V = ??, T = 180 C, P = 101kpa

Can any one help out? If so can you post your working here or email them to me: randal at mytqik dot com

Thanks for your help.

Post Mon Sep 06, 2004 12:58 am 
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3Faze



Joined: 26 Jun 2004
Posts: 99
Location: Lincolnshire, UK


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Home work troubles eh? Smile

450*C = 723Kelvin (K)
180*C = 453K

Use Charles' Law to avoid converting KPa into SI Units:

Volume = constant * Temperature

So:

constant = Volume/Temperature



Assuming a perfect gas:

Volume[1]/Temperature[1] = Volume[2]/Temperature[2]



To rearrange:

(Volume[1]/Temperature[1]) / Temperature[2] = Volume[2]

Volume[2] = (Volume[1]/Temperature[1]) / Temperature[2]


Then work the numbers.....

Post Mon Sep 06, 2004 4:13 am 
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mytqik



Joined: 26 Jun 2004
Posts: 127


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Thank you very much, that just confirmed what I was doing is right & the datat supplied to me by the client is wrong.

Post Mon Sep 06, 2004 9:34 am 
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