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o 8/30/201 7 1 1 :55 PM 87.3/100。8/29/2017 06:04 PM Calculator-Periodic Table Gradebook -Print Question 17 of 20 onsider again this data for Venus atmosphere Map Air density at ground Atmospheric level Atmospheric components) 96.5% CO2 3.5% N2 0.002% H2O ge Surface Minimum and Temperature pressure at ground composition (main level maximum temperatures 400 °C (lowest) 500 °C (highest) 92 atm 460 °C (day) 460 °C (night) 65 kg/m3 1 atm= 1.01 x 10° Pa T(K)=T(C) + 273.15 Use the phase diagram of water (H20) to estimate its boiling point on the surface of Venus: NOTE: Notice the logarithmic scale in the y-axis of the graph 1 MPa WATER 307 ℃ 1 KPa 37 ℃ 1 Pa O 167 °C 0 100 200 300 400 500 600 700 800 900 1000 Temperature (K) e Previous O Check Answer Next Exit

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Answer #1

Clausius clapeyron equation:

ln P1/P2 = deltaH /R * [ 1/T2 - 1/T1]

P1 = 1 atm

P2 = 92 atm (water will boil when atmospheric pressure = vapour pressure of water)

T2 = ?

T1 = 100 C = 373.15 K

delta H = 40.65 KJ/mol

R = 8.314

ln 1 / 92 = 40.65*1000 / 8.314 * [ 1 / T2 - 1/373.15]

T2 = 569.78 K = 297.78 C

if we go by formula

We can see from te figure that

92 atm = 92.92*10^5 Pa pressure is present -----> in around 300 C

So answer is 307 C

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