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Questions 32-38 refer to the phase diagram below 900 760 500 (Tard T(C) 32. The

ID: 695276 • Letter: Q

Question

Questions 32-38 refer to the phase diagram below 900 760 500 (Tard T(C) 32. The regions defined as X, Y, and Z represent, respectively: a. gas, liquid, solid b. liquid, gas, solid c, solid, liquid, gas d. solid, gas, liquid 33. The normal boiling point of the substance can be found at point a. A b. C C. N d. M 34. The boiling point of the substance at 600 Torr is (approximately): b. 75°C C, 40 d. 25 C a. 150°C 35. The state of the substance at 400 Torr and 90°C is: 36. The temperature at the critical point is approximately: b. Liquid c. Gas d. Canot tell from diagram d. 25°C a. 150°C b. 75 C C. 40°C The temperature at the triple point is approximately: 150°C 37. b. 75°C c. 50°C d. 25°C 38. Moving fom region X lo Yon the graph represents whichliahase change a. melting b. condensation c.sublimation d. boiling e. freezing

Explanation / Answer

Q32

X = is solid, since high pressure systems

Y = must be liwuid, between X and Z

Z = must be gas, due to low pressurized systems

Q33

normal BP = P = 1 atm, o r760 torr

T = --> M point, since this is liquid-vapor

Q34

BP for 600 torr is given between A and M approx so T = 80° approx, nearest answer is 75%

Q35

if P = 400, T = 90°C, then

this is a gas, in Z area

Q36

critical T = must be "C" since there is no difference between gas/liquid phase

Q37

triple point --> point in which all 3 lines intersect

this is A

Q38

x is solid, y is liquid, this is called melting