You should be able to locate a helium tank, a nitrogen
Chapter 12, Problem 12.65(choose chapter or problem)
You should be able to locate a helium tank, a nitrogen tank, or a CO2 tank in the chemistry or physics department of your university. Ask to use one of these for a short period for the following observation: Learn to open and close the valve or valves correctly. Touch the tanks andnozzle to verify that they are at room temperature. Open a tank for 23 seconds and then close it. Touch the nozzle again, and you will nd that it is very cold. Why? (Hint: The expansion of the gas is nearly adiabatic.)
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