5. Water has a specific heat of about 4 J/Kg. It has a heat of fusion of about 330 J/g. A 100-g ice cube is added to'a container with 400 g of room temperature (25°C) water. Is the final 500 g of water
A. below 0°C
B. slightly above 0°C
C. close to 25°C
D. near the middle of 0°C and 25°C

The answer is slightly above 0°C.

Explanation:

The ice melts and absorbs 330 J/g × 100 g = 33000 joules.

Cooling 400 g of water from 25°C to 0°C requires

4 J/K-g × 400 g × 25°C = 40000 joules

The heat taken to melt is almost enough to cool the water all of the way to 0°C.

The answer is slightly above 0°C.