Answer
420,000 Joules
Explanation
When ice cools from -10 t0 -20, it releases energy in form of heat. This energy is given by;
Quantity of heat (Energy) = mθC
Where m ⇒ mass of ice
θ ⇒ Change in temperature.
C ⇒ specific heat capacity of ice (water) = 4200 J/Kg/K
∴ Energy = mθC
= 10 × (-10 - -20) × 4200
= 10 × 10 × 4200
= 420,000 Joules
The specific heat capacity of ice is 2.108 kJ/kgK. The heat released can be calculated from the formula
[tex] E=ms \Delta T\\
E=(10)(2108)(-10+20)\\
E=210.8 kJ [/tex]
Thus the amount of energy released in Joules is 210,800 J.
