gonefishin, I understand what you mean but by your interpretation of the laws of thermodynamics a car should run on croissants. there is plenty of energy in a croissant, why is’nt this car moving?
There are plenty of caloris in croissants, but unfortunaly for the laws of thermodynmics the body does not always treat croissant calories as fuel. It can take peoples croissant calories and turn them into fat, (look up insulin resistance), and them make that fat very difficult to burn as fuel.
There are quite a lot of calories in diesel, if I drank that would it contribute to my calorie balance (by your interpretation of the laws of thermodynamics)