How do we measure energy stored in the chemical bonds of molecules in food?mealspoundscaloriesinches

The energy stored in the chemical bonds of molecules in food is measured in calories. Here are the steps:

1. Food is burned in a device called a bomb calorimeter. The calorimeter is surrounded by water.

2. As the food burns, it heats up the water and the temperature of the water is measured.

3. The increase in the water's temperature is used to calculate the amount of energy that was in the food. This is because we know how much energy is required to raise the temperature of water by a certain amount (this is a known physical property of water).

4. The energy is then reported in calories. One calorie is the amount of energy required to raise the temperature of one gram of water by one degree Celsius.

5. For food labels and nutritional information, the energy is often reported in kilocalories (often just called "Calories" with a capital C). One kilocalorie is equal to 1000 calories.