Question

When steam at 100°C is passed through a hole drilled in a slab of ice at 0°C certain amount of ice melts. Find the amount of ice that melts. (sp. latent heat of fusion of ice = 336 J/g, sp. latent heat of vapourisation of steam = 2268 J/g, Sp. heat cap. of water= 4.2 J/g°C) (Take mass of steam as 1000 g)

Answer 1

Heat given out by steam =  Heat taken by ice

m₁L_v+m1 x C x Δ T = m₂L_i

(1000 x 2268) = (1000 x 4.2 x 100) = m₂ x 336

m₂ = `2688000/336` = 8000 g

8000 g of ice melts.