Question

What mass of steam at 100'C must be mixed with
150 g ice at melting point, in a thermally insulated
container, to produce liquid water at 40°C
(1) 40g
(2) 150 gm
(3) 30 gm
(4) 100 gm​

Answer 1

By PRINCIPLE OF CALORIMETER

m (540) + m(1)(100-40)= 150(80)+150(1)(40-0)

540m+60m = 12000+7200

m = 40g