I am trying to calculate the energy needed to heat 1 gal of water from x to y degree so I can find the cost?

Question

I knoe the cost per therm of gas which is needed to heat the water. 1) form x to y degree, and 2) from x to boil for staem. The volume of water heated is different, it could be 500 gallons, or less or more. The temps normally is 75 to 180, and 75 to staem. Please provide the method of how this is done for future calcs.

Thanks

Answer 1

With powergen about £9.50
With Gritish Bas about £14.67
With anyone else about £6.45

and if you do it in your back garden on the bonfire £0.00

Answer 2

Sensible heat: Heating water = 1 Btu/lb/°F. (Up to 212°F)
Latent Heat: Vaporising water = 144 Btu/lb/°F (At 212°F)

If you're from the US 1 gallon of water weighs 8.3 lbs.

1...Gals x ΔT x Btu = Temp. change °F.

2... Gals x 10 x 144 Btu = Vaporisation of water)

I don't know what the US system is for therms.

Answer 3

some individuals are using the Imperial equipment .. no longer something incorrect with that. clever warmth: Heating water = a million Btu/lb/°F. (as much as 212°F) Latent warmth: Vaporising water = one hundred forty four Btu/lb/°F (At 212°F) a million...Gals x ?T x 10 Btu = Temp. substitute °F. 2... Gals x 10 x one hundred forty four Btu = Vaporisation of water) (the comparable figures are used for condensing, cooling and freezing. (liberating warmth potential) the fee in keeping with therm relies upon upon the style of Cubic ft of gasoline used. Your gasoline invoice provides you with the conversion info. (i think the US equipment of gallons is a touch distinctive). .....

Answer 4

I see we are all being asked to do your physics homework. One question OK. Four or five that you really should have listened to in class or looked up in a textbook is too much. Google your questions on the net and work it out for yourself.

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