That crossed my mind however it really did feel like a burn. In any case I'm tempted to try it again with thermometer handy although I'm not sure how I'd use it. The other thing is my scuba tanks which are under much higher pressure do get cold however I can still lay my hands on the valve...
Hi folks. I had a strange thing happen to me and I was wondering if some of you physics gurus could explain it to me. It's my understanding that gas escaping from a pressurized tank makes things cooler. In fact I recently had to empty my scuba tanks for transport and the valves did indeed ice up...