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Question: 80 gm of water at 30<sup>0</sup>C is poured on a large block of ice at 0<sup>0</sup>C. The mass of i...

80 gm of water at 300C is poured on a large block of ice at 00C. The mass of ice that melts is –

A

160 gm

B

80 gm

C

40 gm

D

30 gm

Answer

30 gm

Explanation

Solution

Heat released by water

DQ = 80 × 1 × 30 = 2400 cal ……(i)

Mass of Ice melt

2400 = m × 80 [DQ = mL]

\ m = 240080\frac{2400}{80} = 30 gm