The heating curve for 180.0 grams of water depicts temperature changes during heating from -22.2°C to 111.1°C. It includes segments for melting, a constant temperature phase (solid to liquid), boiling, and another constant temperature phase (liquid to gas), illustrating energy absorption and phase transitions.
A heating curve is a graph that represents the temperature change of a substance as heat is added. For water, the heating curve typically consists of several segments corresponding to different phases and phase transitions. Here's a sketch of the heating curve for 180.0 grams of water from -22.2°C to 111.1°C:
1. **Segment 1: Solid to Liquid (Melting)**
- Temperature range: -22.2°C to 0°C
- Slope upward, indicating the absorption of heat as the ice absorbs energy to overcome intermolecular forces and melt.
2. **Segment 2: Liquid (Constant Temperature)**
- Temperature range: 0°C to 100°C
- Horizontal line at 0°C, representing the phase transition from solid to liquid. During this time, heat is absorbed, but the temperature remains constant as the substance undergoes a phase change.
3. **Segment 3: Liquid to Gas (Boiling)**
- Temperature range: 100°C to 111.1°C
- Slope upward, indicating the absorption of heat as the liquid water absorbs energy to overcome intermolecular forces and turn into vapor.
4. **Segment 4: Gas (Constant Temperature)**
- Temperature range: 111.1°C and onward
- Horizontal line at 111.1°C, representing the phase transition from liquid to gas. Again, heat is absorbed, but the temperature remains constant during this phase change.
Note: The temperature values and specific slopes would depend on the heat capacities and phase transition energies of water. The general shape, however, follows the principles outlined for a heating curve.