Comparison between the outgassing model in VPLanet (solid lines) and in VolcGases (dotted lines). The top row displays true values, while the bottom row displays the percent difference between each model. The first column illustrates the difference in the partial pressure of CO₂ (green) and H₂O (blue) in the gas bubble. The second column illustrates the difference in the fraction of moles in the gas phase vs. the melt phase, α_gas. The third column illustrates the difference in the water outgassing rate, calculated from ﹩{P}_{{{\rm{H}}}_{2}{\rm{O}}}﹩ and α_gas.