ne proposal for an effortless method of losing weight is to drink large amounts of cold water. Water has no caloric food value. The body must provide heat in order to bring the temperature of the water to body temperature, 37 ̊C. This heat is provided by burning of stored carbohydrates or fat. a. How much heat is required (which must be provided by the body) to warm 1.00 L of water from 0 ̊C to 37 ̊C? Calculate this value in both Joules and calories. (Assume the density of water is 0.997 g/mL) b. How many kilograms of body fat must be burned to provide this heat? (use the conversion factor of 9 kcal/g fat)
Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
One proposal for an effortless method of losing weight is to drink large amounts
of cold water. Water has no caloric food value. The body must provide heat in
order to bring the temperature of the water to body temperature, 37 ̊C. This
heat is provided by burning of stored carbohydrates or fat.
a. How much heat is required (which must be provided by the body) to warm
1.00 L of water from 0 ̊C to 37 ̊C? Calculate this value in both Joules and
calories. (Assume the density of water is 0.997 g/mL)
b. How many kilograms of body fat must be burned to provide this heat?
(use the conversion factor of 9 kcal/g fat)
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
