what is the total kinetic energy of the atoms and molecules in a substance
The internal energy of a substance is the total of the kinetic energy and potential energy of its atoms/molecules. Heat is energy that flows between objects as a result of differences in their temperatures.Objects do not contain heat they contain internal energy. calorie = the heat energy needed to raise the temperature of 1 gram of water 1 o C. 1000 calories = 1 dietary calorie (or Calorie with a capital C), enough energy to. raise the temperature of 1 liter of water 1 o C. A Big Mac has 570 dietary Calories, or 570,000 calories.