Answer to Question #323371 in Molecular Physics | Thermodynamics for Mahhum khan

Question

The atmosphere of Venus is 96.5% CO2 and 3.5% N2 by weight. The pressure at the surface is 92 bar (1 bar = 101,325 Pa). The density of Venus’ atmosphere is 65 Kg/m3 at the surface. The gas constant for CO2 is 188.92 J/kg-K and for N2 is 296.80 J/kg-K. Assume all of these values have relative uncertainties of +/- 1%. The ideal gas law can be written asP (Pa) /ρ (kg/m3) = R (J/kg-K) T (K)Give all your answers in terms of X +/- Y where X is the expected value and Y is the absolute uncertainty of X.a. What is the average gas constant for Venus’ atmosphere?b. What is the predicted surface temperature of Venus by the ideal gas law?c. Research the actual measured surface temperature of Venus. How well does the ideal gas law predict the surface temperature of Venus?

Answer 1

Answer

Venus's upper atmosphere extends from the fringes of space down to about 100 km (60 miles) above the surface. There the temperature varies considerably, reaching a maximum of about 300–310 kelvins (K; 80–98 °F, 27–37 °C) in the daytime and dropping to a minimum of 100–130 K (−280 to −226 °F, −173 to −143 °C) at night.