Definition

1. 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

1. 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