Concept explainers
Interpretation:
The transition that represents condensation of gas to liquid has to be determined.
Concept Introduction:
A phase diagram is a representation or chart that shows
Answer to Problem 1PQ
Option (B) is the correct one.
Explanation of Solution
Reason for correct option:
In given phase diagram, A represents solid phase of substance. B denotes liquid phase, D indicates vapor phase. C indicates triple point at which solid, liquid and vapor phases of substance exist in equilibrium with each other. Since D is point that corresponds to gas and B represents point where substance exists in its liquid phase, condensation of gas to liquid is shown by transition from D to B.
Reason for incorrect option:
Transition from B to A represents conversion of substance from liquid to solid phase. So freezing is done. Hence option (A) is incorrect.
D represents vapor phase of substance that is final state of substance in transition from C to D. But condensation involves cooling of gas to liquid. Hence option (C) is incorrect.
Transition from A to D represents conversion of substance from solid to vapor phase. So sublimation is done. Hence option (D) is incorrect.
The transition from D to B represents condensation of gas to liquid. Hence, option is (B) is correct.
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