A slab of ice at `0^@`C is constantly heated till the steam is formed at `100^@`C. Draw a graph showing the change in temperature with time. Label the various parts of the graph properly.

Explanation

To solve the problem of drawing a graph showing the change in temperature with time as ice is heated to form steam, we can break down the process into distinct phases. Here’s a step-by-step solution:

### Step 1: Understand the phases of heating
1. **Melting of Ice**: The initial phase involves heating ice at 0°C. The ice will absorb heat and start melting, but the temperature will remain constant at 0°C until all the ice has melted into water.
2. **Heating of Water**: Once all the ice has melted, the water will begin to heat up from 0°C to 100°C. This phase will show a gradual increase in temperature.
3. **Vaporization of Water**: At 100°C, the water will start to vaporize into steam. During this phase, the temperature will remain constant at 100°C until all the water has turned into steam.

### Step 2: Draw the axes
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