Question

80 gm of water at 30°C is poured on a large block of ice at 0°C. The mass of ice that melts is ______.

Options

• 160 gm

• 80 gm

• 40 gm

• 30 gm

Answer 1

80 gm of water at 30°C is poured on a large block of ice at 0°C. The mass of ice that melts is 30 gm.

Explanation:

Heat released by water

ΔQ = 80 × 1 × 30

= 2400 cal    ...(i)

Mass of Ice would melt:

2400 = m × 80 [ΔQ = mL]

∴ m = `2400/80`

= 30 gm