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BIO NMDCAT Biological Importance of Water
nmdcat.online June 27, 2026

The addition of a polar solute to water, such as ethanol, results in a solution that

A. Has a higher vapor pressure than pure water at the same temperature
B. Is a perfect conductor of electricity
C. Boils at a lower temperature than pure water
D. Has a greater entropy than pure water and the solute separate
✓

📝 Explanation

The dissolution process disrupts the local, ordered structure of both the solute and the water, distributing the solute molecules randomly throughout the solvent. This increase in randomness represents an increase in the overall entropy (ΔS > 0) of the system, which is a driving force for dissolution.

📖 Additional Information

  • Has a higher vapor pressure than pure water at the same temperature
  • Is a perfect conductor of electricity
  • Boils at a lower temperature than pure water
  • Has a greater entropy than pure water and the solute separate

The dissolution process disrupts the local, ordered structure of both the solute and the water, distributing the solute molecules randomly throughout the solvent. This increase in randomness represents an increase in the overall entropy (ΔS > 0) of the system, which is a driving force for dissolution.

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