A 1.7g potato chip is burned down to 0.2g in a calorimeter that contains 400.0 g of water

Question

The temperature of the water rises from 21°C to 31°C. The specific heat of water is 1cal/g^ C . How much heat in cal was given off in the reaction?

A. 2.7 cal

B. 4000 cal

C. 4 cal

D. 15 cal

Answer 1

q = mC∆T

q = heat = ?

m = mass of water = 400.0 g

C = specific heat of water = 1 cal/g/deg

∆T = change in heat =31 - 21 = 10 degrees C

q = (400.0 g)(1 cal/g/deg)(10 deg)

q = 4000. cal