The atmosphere of the planet Venus is almost entirely composed of carbon dioxide (about 96.5% CO2). The carbon dioxide on Venus could be in equilibrium with carbonate ions in minerals on the planet's crust. Two possible equilibrium systems involve CaSiO3 and MgSiO3. CaSiO3(s) + CO2(g) ⇔⇔CaCO3(s) + SiO2(s). System 1 MgSiO3(s) + CaCO3(s) + SiO2(s) ⇔⇔ CaMgSi2O6(s) + CO2(g) System 2 The first graph that follows shows the expected pressures of carbon dioxide (in atm) at different temperatures for each of these equilibrium systems. (Note that both axes on this graph are logarithmic). The second graph is a phase diagram for carbon dioxide. Examine the graphs and answer the question Q#2: The approximate temperature on the surface of Venus is about 740K. What is the approximate carbon dioxide partial pressure for system 1 at this temperature? For system 2? (Use a point at approximately the middle of each colored band, which represents the rage of possible value to estimate the carbon dioxide partial pressure.)
The atmosphere of the planet Venus is almost entirely composed of carbon dioxide (about 96.5% CO2). The carbon dioxide on Venus could be in equilibrium with carbonate ions in minerals on the planet's crust. Two possible equilibrium systems involve CaSiO3 and MgSiO3.
CaSiO3(s) + CO2(g) ⇔⇔CaCO3(s) + SiO2(s). System 1
MgSiO3(s) + CaCO3(s) + SiO2(s) ⇔⇔ CaMgSi2O6(s) + CO2(g) System 2
The first graph that follows shows the expected pressures of carbon dioxide (in atm) at different temperatures for each of these equilibrium systems. (Note that both axes on this graph are logarithmic). The second graph is a phase diagram for carbon dioxide. Examine the graphs and answer the question
Q#2: The approximate temperature on the surface of Venus is about 740K. What is the approximate carbon dioxide partial pressure for system 1 at this temperature? For system 2? (Use a point at approximately the middle of each colored band, which represents the rage of possible value to estimate the carbon dioxide partial pressure.)
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