Please kindly answer question attached below. Thank you very much. Imagine an ap

Question

Please kindly answer question attached below. Thank you very much.

Imagine an apparatus consisting a transparent cylinder fitted with a moveable perfectly-sealing piston. The cylinder is immersed in a thermostatted environment. This would, effectively, comprise a receptacle for a pure material, wherein the temperature (T) and pressure (p) might be adjusted independently (within certain bounds). The pure material's conventional phase diagram is shown below. (b) According to the Phase Rule, how many absolute degrees of freedom does the system have in the states represented by the points a, b and c, respectively?

Explanation / Answer

Number of degrees of freedom : F = C-P+2

where C = no of components =1 (as only one pure material is there), P = no of phases

Point a: C =1, P =2, F = 1-2+2 =1

Point b: C= 1, P =1,   F = 1 -1+2 = 2

Point c : C =1, P =1, F = 1 -1 +2 = 2

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