What is the normal freezing point of this substance?_____ What is the normal boi

Question

What is the normal freezing point of this substance?_____ What is the normal boiling point of this substance? _____ What is the normal melting point of this substance? ______ What is the phase (s. 1. g) of a substance at 2.0 atm and 100 degree C? _____ What is the phase (s. 1. g) of a substance at 0.75 atm and 100 degree C? _____ What is the phase (s. 1. g) of a substance at 1.5 atm and 50 degree C? _____ What is the phase (s. 1. g) of a substance at 1.5 atm and 800 degree C? _____ What is the condition of the triple point of this substance? T= _____ P = _____ If a quantity of this substance was at an initial pressure of 1.25 aim and a temperature of 3000 C was lowered to a pressure of 0.23 atm, what phase transition(s) would occur? __________ If a quantity of this substance was at an initial pressure of 1.0 atm and a temperature of 2000 C was lowered to a temperature of-2000 C. what phase transition(s) would occur? _____ If a quantity of this substance was at an initial pressure of 0.5 atm and a temperature of 2000 C was lowered to a temperature of -2000 C. what phase transition(s) would occur? _____ If this substance was at a pressure of 2.0 atm. at w hat temperature would it melt? ______ If this substance was at a pressure of 2.0 atm. at what temperature would it boil? ______ If this substance was at a pressure of 0.75 atm. at what temperature would it melt? _____ If this substance was at a pressure of 0.75 atm. at what temperature would it boil ? _____ At what temperature do the gas and liquid phases become indistinguishable from each other?

Explanation / Answer

Normal freezing point, melting point and boiling points are calculate at 1 atm pressure.

At 1 atm pressure,

(1)Freezing point is (liquid to solid) = 110 oC

(2)Boling point (liquid to vapor) = 400 oC

(3) Melting point (solid to liquid) = for pure of freezing point = 100 oC

(4) At 2 atm and 200 C , the state is solid

(5) At 0.75 atm and 100 C, the state is liquid

(6) At 1.5 atm and 50 C, the state is solid

(7) Here it is almost liquid-gas interface, may be liquid (picture is not so clear)

(8) T = 100 C and P = 0.68 atm

(9) No change in phase. it remains in gas only

(10) first gas to liquid and then liquid to solid

(11) gas to solid

(12) The solid will melt at 200 C

(14) At 0.75 atm, the melting point is at 100 C (nearly)

(15) Th boling point is at nearly 200 C

(16) After 850 C we cannot differentiate liquid and gas

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