Question

Isotherms of carbon dioxide at various temperature are represented in Fig.
Answer the following questions bases of this figure.
(i) In which state will `CO_(2)` exist between the pointa a and b a temperature `T_(1)`?
(ii) At what point will `CO_(2)` start liquefying when temperature is `T_(1)`?
(iii) At what point wil `CO_(2)` be completely liquafied whe temperature is `T_(2)`.
(iv) Will condensation take places when the temperature is `T_(3)`.
(v) What portion of the isotherm at `T_(1)` represents liquid and gaseous `CO_(2)` at equilibrium ?

Answer 1

(i) `CO_(2)` gas will exist in the gaseous state.
(ii) `CO_(2)` gas will start liquefying at point b.
(iii) `CO_(2)` will get completely liquified at point `g`.
(iv) `No`, of it is not possible `T_(3)` is higher than critical temperature `(T_(c))`.
The portion between b and c represents liquid and gaseous `CO_(2)` at equilibrium.