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

• A. Water (H2O)
• B. Ethanoic acid (CH3COOH)
• C. Propane (C3H8)
• D. Ethanol (C2H5OH)

Answer: (B)

Verified step by step guidance

1. Understand that vapor pressure is inversely related to the strength of intermolecular forces: the lower the vapor pressure at a given temperature, the stronger the intermolecular forces in the liquid.
2. Identify that Table H lists vapor pressures of various compounds at different temperatures, allowing comparison of their intermolecular forces based on vapor pressure values.
3. Locate the vapor pressure values for Water (H2O), Ethanoic acid (CH3COOH), Propane (C3H8), and Ethanol (C2H5OH) at or near 60 kPa in Table H.
4. Compare the temperatures at which each compound has a vapor pressure of 60 kPa; the compound that reaches 60 kPa at the highest temperature has the strongest intermolecular forces because it requires more heat to reach that vapor pressure.
5. Conclude that the compound with the strongest intermolecular forces at 60 kPa vapor pressure is the one that corresponds to the highest temperature in Table H, which is Ethanoic acid (CH3COOH).