The energy it takes to raise the temperature of one litter of water one degree celsius is commonly referred to as a 1000

The energy it takes to increase temperature of one L of water by 1°C is commonly referred to as a 1000 cal.

Explanation:

Calorie is a unit which is used to measure heat or energy. It is defined as the amount of the heat energy required to increase the temperature of 1 g water by 1 K or 1°C. It is also known as gram calorie and is denoted by cal.

Whereas, the amount of the heat energy required to increase the temperature of 1000 g or 1 kg (1 kg = 1000 g = 1 L ) water by 1 K or 1°C, is called kilocalorie or food calorie and is denoted by Cal or kcal.

Therefore, 1 Cal or 1 kcal = 1000 cal.

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