In the temperature of air above a pond is 8°C thermal conductivity of ice is 0.005 C.G.S. units, latent heat of fusion of ice is 79.9 cal/gram the density of ice is 1 gm/cu.m, the time taken for the formation of ice layer of 1 cm thickness is
A)200 seconds
B)100 seconds
C)12.5 seconds
D)10 seconds
E)None of the above

Question

Quizplus · Accepted Answer

Explanation:Heat lost by air = Heat gained by ice=> K(A/d)(t2 - t1) = mL=> (0.005 * 100 * 100/1) * (8 - 0) = 1 * 79.9 * 1=> t = 12.5 seconds

In the Temperature of Air Above a Pond Is 8°C