a. The atmospheric pressure is below the triple point. b. The surface pressure i

Question

a. The atmospheric pressure is below the triple point.

b. The surface pressure is above the triple point.

c. The surface temperature and pressure are above the critical point.

d. The surface temperature of 15C is too warm for liquid carbon dioxide at any pressure.

Which of the following statements explains why you will not find Liquid carbon dioxide on the earth's surface? (Use the phase diagram here.) Phase Diagram for Carbon Dioxide critical I point i 7,394.9 solid iquid triple point normal 506.5 melting gas point 101 -78.5-56.4 31.1 Temperature (°C)

Explanation / Answer

Answer is a.

Explanation : The surface pressure is 101 kPa and temperature is 25°c average. So for liquid CO2 pressure should be lowerer than than atmospheric pressure, but here it is 505.6 kPa which is greater. So answer is a.

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