A researcher studying the nutritional value of a new candy p

A researcher studying the nutritional value of a new candy places a 5.80-gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.08

Solution

With the information given in the problem the first thing you are able to do is find qcal

(qcal = Ccal x change in temperature)

qcal = 37.90kJ K-1 x 2.08 degrees Celsius = 78.832 kJ

Now, Food calories are the same thing as kcal or \"big Cal\" which is equal to 4.184kJ per kcal so we must convert our qcal value into kcals by dividing out 4.184 kJ so kJ\'s cancel and you are left with kcals.

78.832KJ / 4.1984KJ = 18.84 kcals