How many calories is the energy needed to raise the temperature of 1 gram of water by one degree Celsius?

Let me make an additional point here.

We could have given you a one word answer that is correct: calorie.

However, if you had typed your question into google, you would have had this answer come up at the top of the page:

The SI energy unit is the joule. 4.186 Joule = 1 calories. Another common energy unit is the calorie. The calorie, cal, is defined as the amount of energy (heat) needed to increase the temperature of one gram of water by 1oC. The kilocalorie, kcal, equals 1000 small calories.

By getting the one word answer, you would have missed reading about all the other things you would be better off haveing seen.

One calorie is the heat energy required to raise the temperature of one gram of water by degree Celsius at a pressure of one atmosphere.

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