Question

$3.2kg$ of ice at $-10^{\circ }C$ just melts when with a mass $m$ of steam, at $100^{\circ }C$ is passed through it. Then :

• A. $m=400g$
• B. $m=800g$
• C. $m=425g$
• D. $m=900g$

Answer 1

Answer: (C)

$m_{ice}{S}_{ice}\left(10\right)+m_{ice}{L}_{ice}=M{L}_v+M{S}_{water}\left(100\right)$
$\Rightarrow 3200\left(0.5\right)\left(10\right)+3200\left(80\right)=m\left[540+100\right]$
$\Rightarrow m=425gm$