PHYSICS

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COULD YOU FURTHER EXPLAIN HOW MANY BTU ARE REQUIRED TO RAISE THE TEMP OF500 GALLONS OF WATER FROM 70 DEGRESS TO 160 DEGREES FAHRENHIET

  • PHYSICS -

    As Bob Pursley said

    In general:
    heat=mass*specificeheat*changetemp
    or
    heat in = mass of water * specific heat of water * (Final temp -original temp)

    In these strange English units
    weight in pounds is used for mass

    weight = 500 gal * 8.31 pounds/gal = 4155 pounds

    specific heat of water in these units = 1 BTU/pound

    change in temp = 160 - 70 = 90 degrees F

    so

    BTU = 4155 * 1 * 90
    = 373,950 BTU

  • PHYSICS -

    There is no change of state in this problem. If you were changing water to vapor that would require an extra 970 btu/lb or 4,030,350 on top of the 373,950 grid.

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