If 1 pound of water is warmed from 55°F to 60°F, how many BTUs are absorbed?

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Study for the NOCTI Heating, Ventilation, and Air Conditioning (HVAC) Test. Practice with flashcards and multiple choice questions, each question offers hints and explanations. Get ready for your exam!

Multiple Choice

If 1 pound of water is warmed from 55°F to 60°F, how many BTUs are absorbed?

Explanation:
Heating a pound of water uses the formula Q = m c ΔT, where for water the specific heat c is 1 BTU per pound per degree Fahrenheit. With 1 pound and a temperature rise from 55°F to 60°F, ΔT is 5°F. So the absorbed heat is Q = 1 × 1 × 5 = 5 BTUs. The other numbers would correspond to larger or zero temperature changes: 60 BTUs would be for a 60°F rise, 0 would mean no temperature change, and 25 would be for a 25°F rise.

Heating a pound of water uses the formula Q = m c ΔT, where for water the specific heat c is 1 BTU per pound per degree Fahrenheit. With 1 pound and a temperature rise from 55°F to 60°F, ΔT is 5°F. So the absorbed heat is Q = 1 × 1 × 5 = 5 BTUs. The other numbers would correspond to larger or zero temperature changes: 60 BTUs would be for a 60°F rise, 0 would mean no temperature change, and 25 would be for a 25°F rise.

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