Triple point of water is

Options

A. 273 K
B. 373 K
C. 203 K
D. 193 K

Explanation

**Step-by-Step Solution:**

1. **Understanding the Triple Point:**
- The triple point of a substance is the unique set of conditions at which all three phases (solid, liquid, and gas) coexist in thermodynamic equilibrium.

2. **Graph Representation:**
- When we plot a graph of pressure versus temperature for water, we can visualize the regions where each phase exists. The point where the lines intersect is known as the triple point.

3. **Identifying the Triple Point of Water:**
- For water, the triple point occurs at a specific temperature and pressure.

4. **Temperature at Triple Point:**
- The temperature at the triple point of water is approximately 0.01 degrees Celsius, which can also be expressed in Kelvin as 273.16 K.

5. **Pressure at Triple Point:**
- The pressure at the triple point of water is approximately 0.00603 atmospheres.

6. **Conclusion:**
- Therefore, the triple point of water is defined by the temperature of 0.01 degrees Celsius (273.16 K) and a pressure of 0.00603 atm.

**Final Answer:**
- The triple point of water is at a temperature of 0.01°C (273.16 K) and a pressure of 0.00603 atm.

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