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← ScienceWhich process explains decreased vapor pressure from urea?
A)Hydrogen bond disruption reduces volatility✓
B)Urea hydrolysis forms gas products
C)Solute entropic effects lower vapor
D)Urea decomposition releases reducing agents
💡 Explanation
The observed reduced vapor pressure comes from hydrogen bonding. Hydrogen bond networks between urea and water molecules increase the solution's intermolecular forces; therefore vapor pressure decreases because water molecules are held in the liquid phase rather than escaping into the gas phase.
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