How does a calorie compared to a joule

Because it is a form of energy, calories can be converted to joules through a measurement of heat. Calories in nutrition measure the amount of energy needed to heat 1 kg of water 1 degree Celsius.

When finding calories in food, scientists will break down the food to its basic form, place it in a metal container and then submerge the container in water. They will then measure the initial temperature of the water, ignite the food and then measure the temperature difference afterword in Celsius.

The amount of calories is found in a formula where calories equals the mass of the water multiplied by the specific heat of water and multiply that by the change in temperature. The greater the change in temperature, the more calories in the food. The joule is a metric unit of measurement equal to one newton, which is equal to kilograms multiplied by meters per second squared. Joules are a form of kinetic energy, and as a form of kinetic energy can be converted to calories.

The flask would probably feel cooler than before the reaction started. Explanation: An endothermic reaction is a type of of chemical reaction in which energy is absorbed from the surroundings.

The change in free energy is the difference between the change in enthalpy and the product of the Kelvin temperature and the entropy change. Named for the fourth letter of the Greek alphabet shaped like a triangle , a delta is a triangular area where a major river divides into several smaller parts that usually flow into a larger body of water. Skip to content Technology.

It also implies that Joule J is directly proportional to Calorie cal which means that:. When the value in terms of Calorie cal increases, then its value in Joule J increases at a rate of 4. When the value in terms of Calorie cal decreases, then its value in joules J decreases at a rate of 4. As you know, Calorie cal and Joule j are the most important physical quantity in physics.

Hence, the conversion between Calorie and Joule and vice versa is crucial in solving Physics numerical. So scroll down to get the list consisting of various commonly used quantities. Calorie cal. Joule J. We use calories in food instead of joules, and you will be about to know the answer by reading the below text.