Which of the following systems would be best modeled as an ideal solution?
A. Methane + n-decane
B. Methane + methanol
C. Water + n-pentanol
D. Benzene + n-hexane
E. None of the above
A. Incorrect. Methane has a single carbon atom and is well-modeled as spherical. n-decane, is a ten-carbon chain. The size mismatch will give rise to deviations from ideal solution.
B. Incorrect. Methane is a non-polar molecule while methanol is a polar molecular.
C. Incorrect. These are both of different sizes and of significantly different polarities.
D. Incorrect. Benzene is aromatic and planar while n-hexane is linear and aliphatic.
E. Correct. Each of these combinations would probably be non-ideal to an appreciable degree.
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