For the equlibrium `H_(2)O(s)hArrH_(2)O(l)` which of the following statements is true?

Options

A. The pressrue changes do not effect the equlibrium
B. More of ice melts, if pressrue on the system in increased
C. More of liquid freezes, if pressure on the system is increased
D. Less of ice melts, if pressrue on the system is increased

Answer

To solve the question regarding the equilibrium \( H_2O(s) \rightleftharpoons H_2O(l) \), we need to analyze the effects of pressure changes on the equilibrium between solid water (ice) and liquid water.

### Step-by-Step Solution:

1. **Understanding the Equilibrium**:
The equilibrium \( H_2O(s) \rightleftharpoons H_2O(l) \) represents the phase transition between ice (solid) and liquid water.

2. **Le Chatelier's Principle**:
According to Le Chatelier's principle, if an external change is applied to a system at equilibrium, the system will adjust itself to counteract that change. In this case, we are looking at the effect of pressure changes.

3. **Effect of Pressure on Ice-Water Equilibrium**:
- Ice (solid) has a lower density than liquid water. Therefore, when pressure is increased, the equilibrium will shift towards the side with less volume.
- In the case of the ice-water equilibrium, increasing pressure favors the formation of liquid water because liquid water occupies less volume compared to solid ice.

4. **Analyzing the Statements**:
- **Statement 1**: "Pressure changes do not affect the equilibrium."
- This statement is **false** because pressure does affect the equilibrium.

- **Statement 2**: "More of ice melts if pressure on the system is increased."
- This statement is **true**. When pressure increases, the equilibrium shifts towards the liquid phase, resulting in more ice melting.

- **Statement 3**: "More of liquid freezes if pressure on the system is increased."
- This statement is **false**. Increasing pressure does not favor the freezing of liquid water into ice; instead, it favors melting.

- **Statement 4**: "Less of ice melts if pressure on the system is increased."
- This statement is **false**. As previously stated, increasing pressure leads to more ice melting.

5. **Conclusion**:
The correct answer is **Statement 2**: "More of ice melts if pressure on the system is increased."