Venus atmosphere and the Barometric equation and slice it by increments of altitude, the average pressure of a molecule in Venus’ atmosphere is 4639523 pa. The average temp is 628 K. The heat capacity ratio for a mix of gases like Venus is about 1.293. Using that as a starting pressure and temperature condition, if we raise the surface pressure to 92.1 Earth atmospheres, the result is a surface temperature of 735.6 K.
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