Physical State of Water at Different Temperatures
The physical state of water (solid, liquid, or gas) depends on its temperature:
- Below 0°C → Water is in the solid state (ice).
- Between 0°C and 100°C → Water is in the liquid state.
- At 100°C and above → Water starts converting into gas (steam/vapor).
What is the physical state of water at—
(a) 25o °C
Answer:
- Room temperature is around 25°C.
- Water exists in its liquid form at this temperature because it is above freezing point (0°C) but below boiling point (100°C).
- Water molecules are loosely packed and can flow freely.
✅ Water is in the liquid state at 25°C.
(b) o °C
Answer:
- 0°C is the freezing/melting point of water.
- At this temperature, water can exist as both solid (ice) and liquid (water).
- If we cool water, it freezes into ice at 0°C.
- If we heat ice, it melts into water at 0°C.
✅ Water exists as both solid and liquid at 0°C.
(c) 100 °C ?
Answer:
- 100°C is the boiling point of water.
- At this temperature, water starts converting into steam (gas) through boiling.
- Some water is still in liquid form, while some changes into water vapor.
- This is called a phase transition (liquid to gas).
✅ Water exists as both liquid and gas at 100°C.