how can i determine the number of joules and calories a nut can contain for each gram of mass
2007-11-26 13:37:51 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
This type of experiment is done with a calorimeter. A known weight of nut is burned under a pressure of pure oxygen and the rise in temperature of the calorimeter is recorded. In a previous part of the study, a material with a known heat of combustion is burned in the same calorimeter so that the number of calories required to raise the temperature of the calorimeter 1 degree C is known; thus the energy relaesed from your unknown sample can be calculated.
2007-11-26 13:45:28 · answer #1 · answered by Flying Dragon 7 · 0⤊ 0⤋
1 Joule=
A) 0.238845896628 cal (calorie) (small calories, lower case c)
B)2.390 Ã10â4 kilocalorie, Calories (food energy, upper case C)
Cp = 4.184 Joules per gram-degree Celsius.
Ex:
Only one calculation is needed and it is:. q = (27.0 g) (80.0 °C) (4.184 Joules per gram-degree Celsius)
2007-11-26 13:49:31 · answer #2 · answered by Carlis D 1 · 0⤊ 0⤋
one way is to buy a package of nuts and just look on the package and just divide calories by grams and you will have calories per grams. then just convert calories to joules using this in at this web
http://www.uwsp.edu/cnr/wcee/keep/Mod1/Whatis/energymeasures.htm
multiply your calorie by 4.187
2007-11-26 13:47:41 · answer #3 · answered by Anonymous · 0⤊ 0⤋