To raise the temperature of 1 gallon of oil by 1 degree Fahrenheit, it typically requires about 1,800 BTUs. This value can vary slightly depending on the specific type of oil, but 1,800 BTUs is a commonly accepted estimate for heating purposes.
It takes 8.33 BTU to raise the temperature of water 1 degree F.
U.S.gallon = 8.33 pounds of water. Therefore to raise the temperature by one degree F will require 8.33 BTU. The initial temperature of 50 F is inconsequential.
This is a pretty straightforward calculation. By definition, a BTU is the amount of energy required to raise one pound of water one degree F. But you have one gallon of water, which weighs approximately* 8.34 pounds. So, you'd need 8.34 BTU to increase one gallon of water one degree F. Note how the amount of time was not important. Whether you heat the water slowly or quickly doesn't matter. You will still require 8.34 BTU to raise the temperature of a gallon of water one degree F. * I say approximately because the weight of water varies slightly with its temperature. Water is at its densest at 4 degrees Celsius (39 degrees F). A gallon of water at temperatures above and below that value will weigh less.
0.0923Btu Specific heat of copper is 0.0923 Btu/lb F
114,000 BTU/gallon
To calculate the BTU required to raise the temperature of 4 gallons of water from 70°F to 72°F, you first need to find the total weight of the water (4 gallons x 8.34 lbs/gallon = 33.36 lbs). Next, use the specific heat capacity of water (1 BTU/lb°F) to calculate the energy required: 33.36 lbs x 2°F x 1 BTU/lb°F = 66.72 BTU. So, 66.72 BTU is needed to raise the temperature of 4 gallons of water in this scenario.
It takes 8.34 BTU to heat 1 gallon of water 1 degree F. Take 8.34 BTU times number of gallons to determine energy needed to raise pool 1 degree F. Then multiply by how many degrees you need to raise the temperate of the current pool temperature to the desired temperature. Example: 8.34 * 30,000 gal = 250,200 BTU need to raise temperature 1 degree F Next multiple by the number of degrees to warm, say the pool is 55 F. 80F - 55F = 25F. 250,200 BTU * 25 F = 6.255 million BTUs to heat the pool to 80 F. This does not take into account the loss of energy to the surroundings but gives you a starting point to determine the energy needed to heat a mass of water.
114100 Btu
1 gallon of water weighs 8.34 pounds. It takes I BTU to change the temp of 1 pound of water 1 degree F. So for 1 gallon it takes 8.34 BTU. It takes 3412.14 BTU to equal 1 KWH. So 8.34 Btu x (1KWH / 3412.14 BTU) = 0.002444 KWH
For regular gasoline, 125,000 BTU per US gallon
140,000 btu/gallon, nominal
about 40