Question

One calorie is defined as
(A) the amount of heat energy required to raise the temperature of $1\,\,g$ water by ${1^ \circ }\,\,C$.
(B) the amount of heat energy required to raise the temperature of $1\,\,Kg$ water by ${1^ \circ }\,\,C$.
(C) the amount of heat energy required to raise the temperature of $1\,\,g$ water by ${1^ \circ }\,\,F$.
(D) the amount of power required to raise the temperature of $1\,\,g$ water by ${1^ \circ }\,\,C$.

Answer 1

Hint: A calorie is a unit used for measurement, but it does not calculate weight or length. A calorie is a unit used to describe the energy. When we see something contains $100$ calories, it denotes the way of outlining the amount of energy that our body could obtain from eating or drinking them.

Complete step by step answer:
A calorie, is a standard unit to describe energy or heat which is variably explained. The calorie was formally described as the quantity of heat energy necessary at a pressure of $1$ standard atmosphere to increase the temperature of $1\,\,g$ of water to ${1^ \circ }\,\,C$. Since the year $1925$ the calorie has been referred to in the terms of the joule, the explanation since the year $1948$ being that one calorie is equal to roughly $4.2$ joules. The one calorie is defined as the amount of heat energy necessary to increase the temperature of the $1\,\,g$of water by ${1^ \circ }\,\,C$ is called one calorie.
Therefore, one calorie is defined as the amount of heat energy required to raise the temperature of $1\,\,g$ water by ${1^ \circ }\,\,C$.
Hence the option (A) the amount of heat energy required to raise the temperature of $1\,\,g$ water by ${1^ \circ }\,\,C$ is the correct answer.

Note: When we raise the temperature of a system we basically provide it with some energy and which is then absorbed by the system to increase its thermal energy. Our body requires calories just to operate, that is to keep our heart running and our lungs breathing. As a kid, our body also requires calories and nutrients from a variety of foods to grow and develop. And we burn off some of the calories without even realizing it, that is by walking our dog or making our bed.