Question

The capacity of a refrigerator is 600 tr when working between 5 c and +20 c. Determine the mass of ice produced in 24 hours from water at 10 c. Also find the minimum power required to drive the unit. Assume that the latent heat of ice is 336 kj/kg.

Answer 1

Answer:

31g

Explanation:

heat given out by water=Q¹

=mc∆T = 1×200(25–10) = 3000cal.

let m be the mass of ice required. heat taken in by ice = Q¹ =(mc∆T) + mL + (mc∆T)

Q² = 0.5 × m × 14 + m × 80 + 1 × m × 10 = 97m

therefore Q² = Q¹

therefore 97m = 3000 ➡ m = 31g