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Re: OT - From the Country Talk Board
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Posted by Joe (Wa) on March 22, 2005 at 20:28:30 from (67.5.135.36):
In Reply to: OT - From the Country Talk Board posted by Dug on March 21, 2005 at 19:32:00:
Man-o-man, not one engineer in this thread? Well I are one. It takes 1 BTU (British thermal unit) to raise 1 lb of pure water 1ºF @ sea level. That is called sensible heat because it can be measured on a thermometer. It takes 144 BTU to change the state of 1 lb of pure water @ sea level from liquid @ 32ºF to ice @ 32ºF. That is called latent heat of fusion. Latent because it can not be measured with a thermometer like sensible heat. It takes 970.4 BTU to change the state of 1 lb of pure water @ sea level from liquid @ 212ºF to steam @ 212ºF. That is called latent heat of evaporation. That is an irrefutable law of science. Joe
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