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Q: How many btu's to change 1 lbs of steam 212 to 312?
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How many Btus are required to change one pound of water at 40F to 200F?

160 btu's. It takes 1 btu (British Thermal Unit) to change the temperature of 1lb of water 1°. This is referred to as sensible heat. This 1 to 1 ratio does not hold true when changing the state of that water to ice or to steam. Changing the state 1lb of water at 212° to 1lb of steam at 212° you must add 970 btu's and to change 1lb of water at 32° into 1lb of ice at 32° you must add 144 btu's. This is referred to as latent heat.


Does it take more energy to heat cold water to 212 F than it does to change 212 F water to steam?

yes. it do.


How many btus are required to change one pound of ice at 20 degrees Fahrenheit to steam at 220 degrees Fahrenheit?

1)This is a 5 part question. The first is realizing that 20F to 32F uses .5BTU per pound per degree. That means it takes 32-20=12*.5=6BTUs to get the ice to 32F. 2)Then you need to know the Latent Heat of Fusion for Ice which is 144BTUs (given). Lets assumes the ice changes from ice to water instantaneously at 32F. 3)Next we calculate the BTUs from 32F to 212F. Which is 1BTU per pound per degree F. 212-32=180 so it take 180BTUS. 4)Next we have to use the Latent Heat of Vaporization of water which will say instantaneously converts water to vapor. This takes 970BTUS (given). 5)Then we calculate the BTUS from 212F to 220F. Which is .5BTUs per pound per degree F which is 220-212=8*.5=4BTUs...... Finally add up all the BTUs and you get 6+144+180+970+4=1304BTUs.


How many number of British Thermal Units are needed to change one pound of ice at 32 degrees Fahrenheit to steam at 212 degrees Fahrenheit?

180


How many BTUs does it take to heat one pound of water from 80 degree F to 212 degree F?

212 - 80 = 132 degrees temperature increase x 1 pound water = 132 BTU


How many times does water expand to make steam at 212 degrees?

1760Type your answer here...


How many Btu are required to change 600 pounds of water at 75 degrees F to steam at 212 degrees F?

1 BTU is required to raise 1lb of water 1 degree F in 1 hour. 212-75=137 degrees 600 lbs water x 137 degrees= 82,200 BTU's required to change 75 degree water to 212 degree water. To change 212 degree water to 212 degree steam it requires 970 btu's (latent heat of vaporization) per lb of water 970 btu x 600 lbs water = 582,000 btu Answer - 582,000 btu+ 82,200 btu = 664,200 btu's


How much do you need for steam?

212 Fahrenheit 100 Celsius


What does 212 mean on va tech helmet?

212 degrees is the boiling point of water (Fahrenheit). The 212 concept is based on the book 212 the extra degree by Sam Parker. It illustrates how one extra degree of effort can make a big difference. "At 211 degrees, water is hot. At 212 degrees, it boils. And with boiling water, comes steam. And with steam, you can power a train."


How many btus are required to change one pound of ice at 20 degree Fahrenheit to steam at 220 degree Fahrenheit?

1)This is a 5 part question. The first is realizing that 20F to 32F uses .5BTU per pound per degree. That means it takes 32-20=12*.5=6BTUs to get the ice to 32F. 2)Then you need to know the Latent Heat of Fusion for Ice which is 144BTUs (given). Lets assumes the ice changes from ice to water instantaneously at 32F. 3)Next we calculate the BTUs from 32F to 212F. Which is 1BTU per pound per degree F. 212-32=180 so it take 180BTUS. 4)Next we have to use the Latent Heat of Vaporization of water which will say instantaneously converts water to vapor. This takes 970BTUS (given). 5)Then we calculate the BTUS from 212F to 220F. Which is .5BTUs per pound per degree F which is 220-212=8*.5=4BTUs...... Finally add up all the BTUs and you get 6+144+180+970+4=1304BTUs.


Steam point of water?

Water turns to steam (or in other words, it boils) at 100 degrees Celsius or 212 degrees Fahrenheit.


How hot can steam get?

The temperature of steam depends on the pressure of the system. Higher pressure steam can get super hot. Steam at atm is around 212 degree F, like boiling water.