Q. What happens if a hole is made in a block of ice at 0°C and filled with water at an initial temperature of 10°C?
Answer: If you cut a hole in a block of ice at 0°C and put water at 10°C in the hole, the temperature of the water will gradually decrease to 0°C. The ice absorbs the heat that the water gives off and will first melt a little. Now that the temperature of both water and ice is 0°C, water can no longer reject heat and ice can no longer accept the heat. Therefore, water does not freeze and at 0°C, water and ice coexist.