small calorie
Học thuậtThân thiện
Definition
- Noun:
- A unit of energy, specifically heat energy, defined as the amount of energy required to raise the temperature of 1 gram of water by 1 degree Celsius (centigrade) at a pressure of one atmosphere. It is a precise scientific measurement used in chemistry and physics.
Usage
- The small calorie is used in scientific contexts, particularly in thermodynamics and chemistry, to measure small quantities of heat energy.
- It is distinct from the large Calorie (kilocalorie) used in nutritional contexts to measure the energy content of food.
Examples
- Noun:
- The reaction released approximately 500 small calories of heat.
- In the laboratory, we measured the heat capacity in small calories per gram per degree Celsius.
- One small calorie is equivalent to approximately 4.184 joules.
Advanced Usage
- The term is often used in contrast to the "large calorie" or "kilocalorie" (Calorie with a capital C). The relationship is: 1 large Calorie (kilocalorie) = 1000 small calories.
- In modern scientific literature, the joule (J) is the SI unit for energy. The small calorie is now a non-SI unit, though it is still encountered.
Variants and Related Words
- Calorie (with a lowercase 'c'): This is the same as a small calorie. The lowercase 'c' is crucial for distinguishing it from the dietary Calorie.
- Gram calorie: A synonym for small calorie.
- Kilocalorie (kcal) / Calorie (with an uppercase 'C'): A unit equal to 1000 small calories, used for food energy.
Synonyms
- Gram calorie
- Calorie (lowercase 'c')
Related Phrases
- Per small calorie: Used to express a rate or ratio, e.g., "energy released per small calorie of fuel consumed."
Noun
- unit of heat defined as the quantity of heat required to raise the temperature of 1 gram of water by 1 degree centigrade at atmospheric pressure