Question

Granite has a specific heat of 800 J/g oC. What mass of granite is needed to store 150,000 J of heat if the temperature of the granite changes from 80 oC to 95 oC? (12.5 g)

Answer 1

12.5g

Explanation:

Given data

Shc= 800 J/g oC

Q=150000J

T1= 80

T2= 95

Q=mc(T2-T1)

150000= m*800(95-80)

150000= m*800*15

150000= 12000m

m= 150000/12000

m= 12.5g