For a given material, its vapour pressure P in atm at absolute temperature T can be expresses as In P= 2-600/T for its solid state and as In P =1-360/T for its liquid state. Assume the external pressure 1 atm. Which of the following statements is TRUE? (A) The In P at the triple point is -0.5. (B) The temperature at the triple point is 240 K. (C) The enthalpy of sublimation 4988.4 J/mol. (D) The entropy of sublimation is 16.6 J/K-mol. (E) The normal boiling point is 360 K.

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For a given material, its vapour pressure P in atm at absolute temperature T can be
expresses as In P = 2-600/T for its solid state and as In P = 1-360/T for its
liquid state. Assume the external pressure = 1 atm. Which of the following
%3!
statements is TRUE?
(A) The In P at the triple point is -0.5.
(B) The temperature at the triple point is 240 K.
(C) The enthalpy of sublimation 4988.4 J/mol.
(D) The entropy of sublimation is 16.6 J/K-mol.
(E) The normal boiling point is 360 K.
Transcribed Image Text:For a given material, its vapour pressure P in atm at absolute temperature T can be expresses as In P = 2-600/T for its solid state and as In P = 1-360/T for its liquid state. Assume the external pressure = 1 atm. Which of the following %3! statements is TRUE? (A) The In P at the triple point is -0.5. (B) The temperature at the triple point is 240 K. (C) The enthalpy of sublimation 4988.4 J/mol. (D) The entropy of sublimation is 16.6 J/K-mol. (E) The normal boiling point is 360 K.
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