Question

One of kg ice at $0^o$C is mixed with $1$kg of water at ${10}^o$C. The resulting temperature will be.

• A. Between $0^o$C and ${10}^o$C
• B. Greater than ${10}^o$C
• C. Lesser than $0^o$C
• D. Equal to $0^o$C

Answer 1

The correct option is D Equal to $0^o$C

Heat required by 1Kg ice to melt $=1000\times 80=80kcal$

Heat released by 1kg of water when cools down from ${10}^{o}C$ to $0^{o}C$ $=1000\times 1\times (10-0)=10kcal$

Heat released is much less than the heat required to melt the ice. So the final temperature is $0^{o}C$