Which of the following best explains why gaseous NH₃ deviates from ideal behavior MORE than CH₄ under identical conditions of 250 K and 5.0 atm?
a) NH₃ has a greater molar mass than CH₄, so its molecules move more slowly and deviate more from ideal behavior.
b) NH₃ molecules engage in hydrogen bonding, leading to stronger intermolecular attractions.
c) Because NH₃ is polar, each molecule occupies a larger effective volume (larger van der Waals b), so the volume correction becomes significant.
d) NH₃ has a smaller molecular volume, causing more frequent collisions and therefore greater deviation.