A 1.2 g potato chip is burned under a test tube filled with 10. g water. The temperature rises from 25 ˚C to 65 ˚C. How many Calories are contained in that chip?

Question

1000 calories = 1 Calorie

 q=mSH∆t

SH water = 1cal/g˚C

Answer 1

q = mC∆T

q = heat = ?

m = mass of water = 10. g

C = specific heat water = 1 cal/gº

∆T = change in temperature = 65 - 25 = 40º

q = (10.g)(1 cal/gº)(40º)

q = 400 cal x 1 Calorie / 1000 cal = 0.400 Calories in a 1.2 g potato chip