Asked by Shannon nault

If a gas water heater was able to produce 25000 btu/hr, how long would it take to heat 30 gal of water from 70f to 140f

Answers

Answered by Damon
You need the specific heat of water in BTU per gallon deg F
Well the specific heat of water is ONE BTU per POUND deg F
and a gallon is about 8.33 pounds of water
so
C = 8.33 BTU/(gal deg F)
SO WE NEED
btu = 8.33 * 30 * 70 = 17496 btu

17497 BTU = 25000 t
so
t = 0.7 hours
or
42 minutes
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