If 1 calorie is the amount of energy it takes....?

Question

I have been taught that 1 calorie is the amount of energy it takes to increase the temperature of 1 litre of water by 1 degree.

But if the room temperature is (for example) 20 degrees C, then increasing the temperature from say 1 to 2 degrees would take less energy than to increase it from 41 to 42, because the surrounding air at room temperature would either be helping increase the water temperature or hindering the temperature increase.

So my question is, does the calculation, that produces the result that 1 calorie is the amount of energy needed to increases the temperature of 1 litre of water by 1 degree, take into account the difference, caused by the temperature of the room?

Answer 1

It has nothing to do with room temperature. It is simply the TOTAL energy required to raise the volume of water by that temperature. This could include energy COMING FROM THE ROOM. If you leave 1 litre of cold water on the counter and let it sit until it warms up one degree, then the room has done 1 calorie of work on the bucket. If the 1 litre of water is already at room temperature and you warm it up one degree, then you have done 1 calorie of work to it. Either way, its one calorie of work.

Answer 2

Simple answer is no it doesn't consider it.  Its considering to be isolated from all external heat sources and only involves heating the water!