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.
It doesn't work that way. There is not a certain number of btus to raise air temperature. You would have to know how much air. A BTU is the British Thermal Unit. That is the amount of energy required to raise the temperature of one pound of water one degree F.
That depends how fast you want to do this. Please note that "watt" is not a unit of energy, it's a unit of power (energy per time unit).
A watt is a unit of power: what is required is probably the amount of energy - which is measured in joules.
1650 watts.
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.
It takes 2.44 calories of heat to raise the temperature of one gram of ethyl alcohol by 1 degree Celsius.
It takes 8.33 BTU to raise the temperature of water 1 degree F.
It would take approximately 250,000 watts to raise the temperature of 200 liters of water from 83°C to 84°C in one minute. This calculation is based on the specific heat capacity of water and the formula for calculating energy required to raise the temperature of a substance.
It doesn't work that way. There is not a certain number of btus to raise air temperature. You would have to know how much air. A BTU is the British Thermal Unit. That is the amount of energy required to raise the temperature of one pound of water one degree F.
It takes 1 calorie to raise the temperature of 1 gram of water by 1 degree Celsius. Therefore, to raise the temperature of 1 gram of water by 5 degrees Celsius, it would require 5 calories.
1 gallon of water is 4540 cc and 1 degree F is 0.555 degrees C, so raising 4540 cc of water by 0.555 degree C would take 4540x0.555 calories, or 2520 calories. Multiply by 4.2 to convert to joules which gives 10590 joules. Therefore the energy required is 10590 joules which is the same as 10590 watt-seconds. That could be done by 100 watts in 105.9 seconds, or 1000 watts in 10.59 seconds.
2.4705 watts/hour
It takes 4186 joules to raise the temperature of 1 kilogram of water by 1 degree Celsius. The mass does make a difference.
This question can not be answered without know much more information. Such as the material that needs to have its temperature changed. How much of that material there is.
Since watt is a unit of power (how fast energy is transferred), you can do this with almost any amount of power - as little or as much as you want, depending on how fast you want to heat the water. The time it takes will depend on the initial temperature, the amount of water, and the power.
The answer will depend on the object whose temperature you are trying to increase as well as the substance that the candles are made from. Beeswax and paraffin, for example, have different calorific values.