What is the quantity of heat required to raise the temperature of 1 gram of water by one degree Celsius?

What is the quantity of heat required to raise the temperature of 1 gram of water by one degree Celsius?

• A. Calorie
• B. Joule
• C. BTU
• D. Kilojoule

Answer: (A)

The amount of heat required to raise the temperature of 1 gram of water by one degree Celsius is defined as one calorie. This unit is commonly used in the field of thermodynamics and nutrition to quantify energy, particularly in relation to heat transfer and temperature changes in water, which has a high specific heat capacity.

While joules, BTUs, and kilojoules are also units of energy, they correspond to different amounts of heat. For instance, one calorie is equivalent to approximately 4.184 joules. Similarly, a British Thermal Unit (BTU) is defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit, which is a larger quantity than a calorie. Kilojoules is simply a larger metric unit of energy, where 1 kilojoule equals 1,000 joules, thus it would take several kilojoules to raise the temperature of water by the same amount.

In summary, the calorie is specifically tailored to this exact scenario of heating 1 gram of water by one degree Celsius, making it the correct answer.