Dados:
m = 250 g
Ti = 16°C
Tf = 40°C
c = 1,0 cal/g°C
Q = ?

1cal ≈ 4 joules

Q = m . c . ΔT
Q = m . c . (Tf - Ti)
Q = 250 . 1 . (40 -16)
Q = 250 . 1 . 24
Q = 6 000 cal

1 cal 4 Joules
6 000 cal x
x . 1 = 6 000 . 4
x = 24 000 Joules de energia