To answer this question, we need to refer to the phase diagram of carbon dioxide (CO2). A phase diagram shows the states of a substance at different temperatures and pressures.

For CO2, at a pressure of 5 atm and a temperature of -20°C, we are in the region of the phase diagram that corresponds to the solid phase. This is because the sublimation point of CO2 (the temperature at which it changes from a solid to a gas) at 5 atm is higher than -20°C.

Therefore, the answer is c. solid phase only.

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To answer this question, we need to refer to the phase diagram of carbon dioxide (CO2). A phase diagram shows the states of a substance at different temperatures and pressures.

For CO2, at a pressure of 5 atm and a temperature of -20°C, we are in the region of the phase diagram that corresponds to the solid phase. This is because the sublimation point of CO2 (the temperature at which it changes from a solid to a gas) at 5 atm is higher than -20°C.

Therefore, the answer is c. solid phase only.

Knowee AI · Accepted Answer

To answer this question, we need to refer to the phase diagram of carbon dioxide (CO2). A phase diagram shows the states of a substance at different temperatures and pressures.

For CO2, at a pressure of 5 atm and a temperature of -20°C, we are in the region of the phase diagram that corresponds to the solid phase. This is because the sublimation point of CO2 (the temperature at which it changes from a solid to a gas) at 5 atm is higher than -20°C.

Therefore, the answer is c. solid phase only.

Consider the phase diagram of carbon dioxide. At a pressure of 5 atm and a temperature of -20°C, in which phase(s) does carbon dioxide exist?Select one:a.gas phase onlyb.solid and gas phasesc.solid phase onlyd.liquid phase only

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