Water has high boiling point because

Options

A. It has high molecules mass
B. It has high lattice energy
C. It is a weak acid
D. Molecules are associated by hydrogen bonding

Answer

### Step-by-Step Text Solution:

1. **Understanding the Question**: The question asks why water has a high boiling point. We need to analyze the reasons behind the boiling point of water compared to other substances.

2. **Evaluating the Options**: The question provides several options. We will evaluate each option to determine which one correctly explains the high boiling point of water.

3. **Option 1: High Molecular Mass**:
- Water (H₂O) has a molecular mass of about 18 g/mol, which is relatively low compared to many other substances.
- Conclusion: This option is incorrect as high molecular mass does not contribute to the high boiling point of water.

4. **Option 2: Lattice Energy**:
- Lattice energy refers to the energy released when ions form a solid ionic compound. It is more relevant to ionic compounds than to molecular compounds like water.
- Conclusion: This option is also incorrect as lattice energy does not relate to the boiling point of water.

5. **Option 3: Weak Acid or Strong Acid**:
- Water is a neutral molecule and does not behave as a weak or strong acid in the context of boiling point.
- Conclusion: This option is irrelevant to the boiling point of water.

6. **Option 4: Hydrogen Bonding**:
- Water molecules exhibit strong hydrogen bonding due to the electronegativity of oxygen. Each water molecule can form hydrogen bonds with up to four neighboring water molecules.
- These hydrogen bonds require significant energy to break, resulting in a higher boiling point.
- Conclusion: This option is correct. The presence of hydrogen bonding is the primary reason for the high boiling point of water.

7. **Final Answer**: Water has a high boiling point because of hydrogen bonding between water molecules.