One BTU is the unit of measure required to raise the temperature of 1 lb of water by 1 degree F.

One BTU is the unit of measure required to raise the temperature of 1 lb of water by 1 degree F.

• A. False
• B. One gallon of water by 1 degree F
• C. The unit of measure required to raise the temperature of 1 lb of water by 1 degree F
• D. One pound of water by 1 degree C

Answer: (C)

The main idea here is understanding what a BTU represents. A BTU is defined as the amount of heat energy required to raise the temperature of 1 pound of water by 1 degree Fahrenheit, at standard pressure. That makes the statement true as written because it directly matches this definition. If you heat a different amount of water, the energy changes accordingly—for example, a gallon of water weighs about 8.34 pounds, so raising a gallon by 1°F takes around 8.34 BTU. And using Celsius changes the scale, since 1 pound raised by 1°C would require about 1.8 BTU (because 1°C equals 1.8°F in temperature intervals). The key point is that a BTU is tied to 1 pound of water and a 1°F temperature change.

The main idea here is understanding what a BTU represents. A BTU is defined as the amount of heat energy required to raise the temperature of 1 pound of water by 1 degree Fahrenheit, at standard pressure. That makes the statement true as written because it directly matches this definition. If you heat a different amount of water, the energy changes accordingly—for example, a gallon of water weighs about 8.34 pounds, so raising a gallon by 1°F takes around 8.34 BTU. And using Celsius changes the scale, since 1 pound raised by 1°C would require about 1.8 BTU (because 1°C equals 1.8°F in temperature intervals). The key point is that a BTU is tied to 1 pound of water and a 1°F temperature change.