Question

80 gm of water at ${30}^{\circ }C$ are poured on a large block of ice at $0^{\circ }C$. The mass of ice that melts is

• A. 30 gm
• B. 80 gm
• C. 1600 gm
• D. 150 gm

Answer 1

The correct option is A

30 gm

If m gm ice melts then

Heat lost = Heat gain

$80\times 1\times (30-0)=m\times 80\Rightarrow m=30gm$