I assume you mean degrees Fahrenheit.
First you must remove heat to make ice not add it. Next, the amount depends largely on the quantity (mass) of water being frozen.
Water has a enthalpy of fusion of 333.55 KJ / Kg
This means that for each kilogram of water you must remove 333.55 kilo-Joules to make it into ice.
A conversion factor of 1 : 0.9478 between KJ and BTU gives us 316.14 BTU per Kilogram of water.
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It takes 1000 calories to heat 1 litre of water 1 degree C.
1 BTU = heat corresponding to change in temperature of 1 pound of water by 1° Fahrenheit.Weight of 1 gallon of water = roughly 8.33 poundsHeat corresponding to change in temperature of 1 gallon of water by 1° Fahrenheit = 8.33 BTU.But it doesn't take that, i.e. you don't have to supply it. You're talking about lowering thetemperature, so you're just allowing the water to cool on its own. As it does, it releases8.33 BTU of heat, which you can then collect and take away to use somewhere else.
If you're in Celsius, 13459.5 Btu's. If you're in Fahrenheit, 12632.5 Btu's.
Not sure exactly what you are asking but it takes 1 btu to raise the temprerature of 1 pound of water by 1 degree F. ( 4.2 joules to raise 1 lb by 1 degree Celsius ) so it depends on how much water we are talking about. there is also a transition to boiling where the water has reached 212 'F and has not yet begun to boil... it then takes an additional 970.3 btu's ( per lb ) for the water to achieve boiling, this is called the latent heat of vapourization .. hope this helps
212 - 80 = 132 degrees temperature increase x 1 pound water = 132 BTU
1320 btu`s
One BTU is the energy required to raise one pound of water by one degrees. Therefore, your answer would be one half.
It takes approximately 970 BTUs to convert one pound of water at 212°F (100°C) to steam at the same temperature.
2250
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That will completely depend on how much water there is.
It takes 8.33 BTUs to heat up one gallon of water by one degree Fahrenheit. The amount of energy needed to heat the water to a desired temperature will depend on the starting temperature and the desired final temperature.
Heating a gallon of water by one degree Celsius requires around 8,337 BTUs (British Thermal Units) of energy. Since 1 cubic foot of natural gas produces about 1,031 BTUs, you would need roughly 8 cubic feet of natural gas to heat a gallon of water by one degree Celsius.
To raise 1 pound of ice from 32°F to water at 32°F it requires 144 BTUs. Since you have 50 pounds of ice, you would need 50 * 144 BTUs to raise the ice to water at 32°F. To further raise the water from 32°F to 160°F, you would need an additional amount of BTUs based on the specific heat capacity of water.
You would need to remove approximately 1200 BTUs of heat to convert a gallon of water to ice. There are 8.34 lb in a gallon of water, which converting to lb-moles is 0.463. The latent heat of crystallization for water is -2583.4 BTU/lb-mole. Multiplying the two together and you get -1197 BTUs, which means you need to remove that amount of heat to convert the gallon of water to ice.
In a solid state, the molecules are bound together; these bonds must be broken to convert the substance from solid to liquid, and that requires energy.