Question

would having different atmospheric pressure have a effect on the accuracy of gas laws?and if so, which planets should be most reliable and least

Answer 1

With the changes in atmospheric pressure, the Boyle's law (P₁V₁ = P₂V₂), Ideal Gas law (PV = nRT), Charle's law (V₁/T₁ = V₂/T₂) and Gay-Lussac's law (P₁/T₁ = P₂/T₂) changes accordingly. Thus, the planets that possesses constant value of atmospheric pressure will be more reliable, and those exhibiting varying atmosphere or no atmosphere will be the least reliable.

Answer 2

Boyle's Law , also referred as Gas Law states that, at a constant temperature, the volume of a given mass of gas varies inversely with pressure.
This means that different atmospheric pressure have a effect on the volume of the gas.