[mr cool]

ok so i did a lab in my chem class today and we use a makeshift pop can calorimeter to calculate the amount of calories when we burned peanuts under them, it then heated up the water and we took down the data...

one of the questions is...Calculate the number of calories that were produced in each trial (specific heat of water is 1 cal/g *C)

for this would i do (1.0 cal/g*C)(.4212)(38.1 *C - 14.2 *C) = 10.0 calories?

.4212 is the mass of my peanut before burning..
i also have the mass of the peanut after burning but i dont think we need that on this question.
38.1 is my final heat of water in pop can after burning peanut.
14.2 is my initial heat of water in pop can before burning peanut.

[Borek]

It is mass of water that you should use.

[mr cool]

It is mass of water that you should use.

i used 30.0 ml of water in the pop can so it is 30.0 g instead of the other mass i had?


also another question had me confused.  Using the information in steps 1 and 2 determine the average number of calories per gram of peanuts.... the steps one and two said...

1. Calculate the number of calories that were produced in each trial (specific heat of water is 1 cal/g *C)

2. determine how much peanut mass was lost for each of the trials.

would i take all of the calories i got for each trial and add them up and divide by 5 (# of trials) and get my average for all?



EDIT: wait so one peanut has 717 calories if im using the mass of water...