consider this a follow-up to a previous question "atmospheric composition of planets"
Basically, I am curious as to the relationship between planetary size, temperature, and atmospheric pressure. It seems intuitive that pressure correlates positively with planetary size (big planets = thick atmosphere) and negatively with temperature (hot planets = thin atmosphere).
However, Venus is hotter & slightly smaller than Earth, yet has a much thicker atmosphere. Here are some known atmospheric pressures for planetary bodies:
Venus = 9300 Kp
Earth = 101 Kp
Mars = 0.7-0.9 Kp
Jupiter = 20-200 Kp
Saturn = 140 Kp
Titan = 147 Kp
Any insights are this topic would be appreciated.