I've set up a simple experiment to look at the ideal gas laws. My experiment is relatively simple in that I have a metal tube which is capped on one side. I am then pressurising the tube with air to 100 psi and locking it off.

My thought is that as the pressure increased, with volume held constant, the temperature of the tube should rise. However, after 30 minutes of observation, there is no rise in temperature. Am I missing something? I was expecting to see the temperature of the tube rise.

The tube is SS 316 with a ball valve capping it off at one end and using the pump to hold the pressure once it is reached.

Thank you.

  • $\begingroup$ Are you considering how well your system is/isn't? Consider enclosing the system and setting up a second temp probe to measure ambient temperature. $\endgroup$ – Chavioso May 30 '19 at 18:08
  • $\begingroup$ Thanks for the comment. The setup is not enclosed at the moment and in the workshop. I am using an infrared temperature sensor to measure the temperature of the pipe surface. I didn't think heat loss due to ambient outside air temperature would be too much of an factor, or I would at least see some temperature increase, however small. $\endgroup$ – CJU May 30 '19 at 18:13
  • $\begingroup$ Also, apologies, I didn't realise I posted this in the chemistry section. $\endgroup$ – CJU May 30 '19 at 18:25

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