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3.2 tons of coal is used to provide enough heat to bring the temperature of 2.0 x l0 5 gallons of water up 300 F.

3.2 tons of coal is used to provide enough heat to bring the temperature of 2.0 x l05 gallons of water up 300 F. The heat value of one ton of coal is 2.5 x107 BTU/ton. On gallon of water weighs 8 lbs and BTU’s are calculated by multiplying pounds of water by their change in temperature indegrees Fahrenheit. What is the efficiency?

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