Question

b. Liquid ammonia is used in ice factory
for making ice from water. If water
at 20 °C is to be converted into 2 kg
ice at 0 °C, how many grams of
ammonia are to be evaporated?
vaporization of ammonia=341 cal/g)
latent heat
heat of
(Given: The
Answer: 586.49​

Answer 1

Answer:ssss

Explanation:

Answer 2

Explanation:

Amount of heat released in cooling

2kg water from 20°C to 0°C =

2 X 1000 X 1 X 20 = 40000 cal.

Amount of heat energy released in

converting 2kg water at 0°C to ice =

2 X 1000 X 80 = 160000 cal.

Thus, total energy required in

converting water at 20°C to ice = 200000 cal.

Grams of ammonia to be evaporated =

200000/341 = 586.5g.