Refer to the following phase diagram (not to scale!) for methane: A sample of me
ID: 994829 • Letter: R
Question
Refer to the following phase diagram (not to scale!) for methane: A sample of methane at a pressure of 9.20×10-2 atm and a temperature of 81.0 K is compressed at constant temperature to a pressure of 50.4 atm. Which of the following are true?
Choose all that apply
1. The solid initially present will vaporize.
2. The sample is initially a solid.
3. The sample is initially a gas.
4. The final state of the substance is a solid.
5. No phase change will occur.
45.7 1.00 atm 0.092 90.6 90.7 09.1 190.7 T KelvinExplanation / Answer
methane at a pressure of 9.20×10-2 atm and a temperature of 90.6 K is the triple point of methane. So Initially at 81.0 K, methane should be exist as solid which is further compressed to 50.4 atm. The final state of the substance is solid. No phase change will occur.
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