Question:
The O-H bond length in \( H_2O \) in gas phase is
The O-H bond length in \( H_2O \) in gas phase is
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In molecular structures, bond lengths can vary depending on the phase of the substance. Always refer to standard tables for the exact bond length values in different phases.
Updated On: May 27, 2025
- 95.7 pm
- 90.2 pm
- 104.5 pm
- 115.5 pm
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The Correct Option is A
Approach Solution - 1
The O-H bond length in water molecules in the gas phase is well known to be approximately 95.7 pm (picometers).
Thus, the correct bond length is \( \boxed{95.7} \, \text{pm} \).
Thus, the correct bond length is \( \boxed{95.7} \, \text{pm} \).
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Approach Solution -2
Step 1: Understand the O–H bond length in water.
The bond length between oxygen and hydrogen atoms in a water molecule depends on the phase (gas or liquid) due to intermolecular interactions.
Step 2: Bond length in gas phase.
- In the gas phase, water molecules are isolated with minimal intermolecular forces.
- This results in a shorter O–H bond length compared to the liquid phase.
- Experimental measurements show that the O–H bond length in gaseous water is approximately 95.7 pm.
Step 3: Conclusion.
Therefore, the O–H bond length in water vapor (gas phase) is 95.7 pm.
The bond length between oxygen and hydrogen atoms in a water molecule depends on the phase (gas or liquid) due to intermolecular interactions.
Step 2: Bond length in gas phase.
- In the gas phase, water molecules are isolated with minimal intermolecular forces.
- This results in a shorter O–H bond length compared to the liquid phase.
- Experimental measurements show that the O–H bond length in gaseous water is approximately 95.7 pm.
Step 3: Conclusion.
Therefore, the O–H bond length in water vapor (gas phase) is 95.7 pm.
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