Okay, I tried to replicate Esjaavik's experience today and found that the rod did indeed feel hotter when thrust into water as compared to one that was not. The water had to cover more than just the very hot tip though; after a few tries a "Well Duh" explanation became obvious.
The very hot tip transfers the heat to the water almost explosively with all of the instant steam, as the steam rushes for the water's surface it dumps heat into the cooler mid-section of the rod which of course conducts the heat up to one's hand.
As an aside but relevant: 100°F 37°C water makes a comfortable shower, 120°F 48°C water is tolerable for a while, 140°F 60°C water is dangerous and painful. The point being it does not take a great increase in temperature to go from "I can still hold this" to " Drop it NOW" and when working with live steam a 15° increase is exceedingly easily accomplished.. |