1. how is food calorie different from the calorie we use in chemistry?
2. when calculating energy channges for substances other than water, how do we account for the different in their abilities to absorb or release heat?
-thanks
2007-02-27 14:24:01 · 4 answers · asked by helllooooo 2 in Science & Mathematics ➔ Chemistry
1. Calorie in food has units of joules, while the calorie in chemistry is in units of joules. So, one kilocalorie in chem is one Calorie (with a capital C) in food.
2. The heat capacity of the substance. These are tabulated values.
2007-02-27 14:47:48 · answer #1 · answered by lmmonisit 2 · 0⤊ 0⤋
I don't know about the second question, but for the first one:
>A food calorie has a "little" "c" and is less than a Calorie (big "C") and a Calorie is used more for chemistry than food
>I think there's a factor of like 100 or 1000 between them.
>So a kilocalorie = one Calorie (big "C")
>Something like that, I could be wrong
I think a calorie is the amount of energy it takes to heat a mL of water one degree C or something.
Just Google it.
2007-02-27 14:30:31 · answer #2 · answered by Anonymous · 0⤊ 0⤋
1. The food calorie takes into account that the energy of the food will not be 100% efficient. I don't remember the efficiency factor used.
2. I do not understand this question.
2007-02-27 14:30:28 · answer #3 · answered by steve_geo1 7 · 0⤊ 0⤋
this is too easy kid. whocares.
2007-02-27 14:32:30 · answer #4 · answered by Scpwnz 5 · 0⤊ 0⤋