Answer:
Heat need to freeze
100 g supercooled water
\[=m{{S}_{w}}\Delta
T\]
Temperature
of the resultant mixture \[={{0}^{o}}C\]
80
cal heat freezes = 1 g
1000
cal heat freezes \[=\frac{1000}{80}\,g\,=\,12.5\,g\]
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