True or False? Please, explain. (a) Since the three possible phases are solid, l
ID: 590952 • Letter: T
Question
True or False? Please, explain.
(a) Since the three possible phases are solid, liquid, and gas, the max- imum possible value of the number of phases p in the phase rule is 3.
(b) The number of degrees of freedom f is the number of variables needed to specify the thermodynamic state of the system.
(c) The minimum possible value of f in the phase rule is 1.
(d) Along a line in a one-component phase diagram, f = 1.
(e) At the critical point of a pure substance, the densities of the liquid and the vapor are equal.
(f) The enthalpy of vaporization of a liquid becomes zero at critical point.
(g) The relation d lnP/dT Hm/RT2 should not be applied near the critical point.
(h) Increasing the area of a liquid-vapor interface increases U of the system.
(i) The surface tension of a liquid goes to zero as the critical temper- ature is approached.
(j) When three phases coexist in equilibrium in a one-component sys- tem, one of the phases must be a gas, one must be a liquid, and one must be a solid.
Explanation / Answer
(a) Since the three possible phases are solid, liquid, and gas, the maximum possible value of the number of phases p in the phase rule is 3.
ANSWER IS TRUE
BECAUSE P = 4 GIVES F=-1 which defines independent from variable, so does not exist in four phases
(b) The number of degrees of freedom f is the number of variables needed to specify the thermodynamic state of the system.
answer is true
(c) The minimum possible value of f in the phase rule is 1.
the answer is false
incase of P=3 F leads to zero which is seen in single component system at the triple point
(d) Along a line in a one-component phase diagram, f = 1
answer is true
C =1 P =2 (solid-liuid) f= 1-2+2
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.