MCAT General Chemistry Question 265: Answer and Explanation
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Question: 265
2. If the temperature inside the chamber is -60°C, what pressure must the chamber be at in order for the sublimation reaction to be at equilibrium?
- A. 3 × 10-4 atm
- B. 3 × 10-3 atm
- C. 1 atm
- D. 125 atm
Correct Answer: A
Explanation:
A On a P vs. T diagram, sublimation equilibrium is indicated by the line separating the solid and vapor phases. On the graph in Figure 1, it is shown that at -60°C, the solid/gas line is at P = 0.0003 or 3 × 10-4 atm.