A) \[0{}^\circ C\]
B) \[40{}^\circ C\]
C) \[20{}^\circ C\]
D) \[10{}^\circ C\]
Correct Answer: A
Solution :
Heat rejected by 100 g of water at \[80{}^\circ C\]when its temperature becomes \[O{}^\circ C\] is |
\[Q=m\,s\Delta \theta =(100)\,\,(1)\,\,(80)=8000\,cal\] |
But this heat can melt \[m=\frac{Q}{L}\] |
\[=\frac{8000}{80}=100g\] of ice only |
So, temperature remains \[0{}^\circ C\] |
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