A BTU is the amount of heat required to heat or cool 1 lb of water 1 degree, water freezes at 32F so it should not require any more than 1 degree to be below freezing.
There are 8lbs in1 gallon of water, so 8 BTU's will lower a gallon(8 lbs) 1 degree.
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.
The specific heat of water is 1 BTU per pound per degree Fahrenheit. There are 8.3378 lbs/gallon at 60 degrees, which equals 3251.742 pounds of water. The number of BTUs to raise it 188 degrees is then 611,327.496 BTUs.
Approx 8090 BTU
91,333 BTUs in 1 gallon of propane
That will completely depend on how much water there is.
134,000 BTUs per gallon
About 114,000 BTU per US gallon.
6519.2 btus are required.
BTU: British Thermal Unit, the amount of energy it takes to raise one pound of water one degree Fahrenheit. In this case 500g(x aproximatly 8 pounds per gallon) or 4000 pounds x 70(the difference from 5 degrees to 75 degrees), which equals 280,000 BTUS
For regular gasoline, 125,000 BTU per US gallon
jet fuel kerosene is about 126,000 BTU per US gallon
You can assume two temperatures, and calculate the amount of energy required to heat the water from one temperature to the other. Then convert that to BTU.
One gallon of kerosene will produce 134,000 BTUs of energy when burned.
100 BTU if it's Fahrenheit
Depends on the BTUs of the heater.
8.33 btu if the gallon is US measure, 10 btu if the gallon is british measure. A btu is the amount of heat required to raise 1 pound of water 1 degree fahrenheit at atmospheric pressure (14.696 psia).
That depends on what the starting temperature of the water is,and what temperature you want it to reach.If you expect to get a number, you must first give the necessary numbers.
1 BTU = heat corresponding to change in temperature of 1 pound of water by 1Ã‚Â° Fahrenheit.Weight of 1 gallon of water = roughly 8.33 poundsHeat corresponding to change in temperature of 1 gallon of water by 1Ã‚Â° 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.
BTUs to Evaporate One Pound of WaterQuick Answer: Somewhere around 1000BTU/lb Long answer: It depends on the temperature of the water you start with. Before you can evaporate the water, you must heat it to it's boiling point. The warmer the water you start with the fewer BTUs will be needed to heat the water to its boiling point. Keep in mind the BTUs require to raise the water to its boiling point are very few compared to the BTUs required to change the water from a liquid to a gas.One pound of steam contains 1150 BTUs. This is the energy you need to put into the water for it to evaporate if you start with water at 32F. If you start with water at 100F the water already has 70 BTU/lb so the BTUs required to evaporate the water when you start at 100F is 1150-70 = 1080 BTU and so on.You can get all this information in a steam table which can be found easily by searching the web.