Homework Help: Physics

Posted by Mike on Wednesday, December 7, 2011 at 1:36am.

I understand there is a relationship between pressure & temperature in a sealed rigid container.

An open container is placed in a freezer at -15 degrees C then the door is opened and the cap replaced with the freezer at 1000mb what will the pressure be within the container if it is placed in a room with an ambient temperature of 40 degrees C

Thanks

Mike

Physics - drwls, Wednesday, December 7, 2011 at 2:22am
Same answer as yesterday:
http://www.jiskha.com/display.cgi?id=1323068189
Physics - Mike, Wednesday, December 7, 2011 at 2:43am
Thank you again DRWLS but ref my post "site not working correctly". Still cannot read the answer. Most frustrating. Can I close the adverts? Mike
Physics - drwls, Wednesday, December 7, 2011 at 7:38am
Here is the same answer, again.

If you cover an open cold container after removing it from the freezer, warm air at 313 K and P = 1000 mb will come in contact with the contents, and (after sealing with a lid) chill at constant volume to 258 K.

Since P/T = constant in this case, you end up with a pressure P' that satisfies the equation
P'/258 = Po/313, where Po = 1000 mb
P' = 258/313 * 1000 = 824 mb

Note that I had to use Kelvin temperatures.

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