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Based on Table H, which compound has the strongest intermolecular forces at 60 kPa?

June 2023 NY Regents Chemistry Exam


39 Based on Table H, which compound has the strongest intermolecular forces at 60 kPa?

(1) ethanoic acid

(2) ethanol (3) propanone

(4) water


Solution: The stronger the intermolecular forces, the lower the vapor pressure of a compound. We need to look at Table H and find 60kPa on the x-axis and then go up until we touch the line for each compound listed to see its vapor pressure. The ones with the lowest vapor pressure will have the strongest intermolecular forces.

Answer:1



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