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17. Which of the following would have a zero AH? A) Hg(g) B) F(g) C) N2(g) D) He(1) E) 12(g)

17. Which of the following would have a zero AH? A) Hg(g) B) F(g) C) N2(g) D) He(1) E) 12(g)

Chemistry
Chemistry
9th Edition
ISBN:9781133611097
Author:Steven S. Zumdahl
Publisher:Steven S. Zumdahl
Chapter5: Gases
Section: Chapter Questions
Problem 108E
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17. Which of the following would have a zero AH°? A) Hg(g) B) F(g) C) N2(g) D) He(1) E) 12(g) 18. A sample of helium gas occupies a sealed container. What would happen to the volume if the pressure was halved at a constant temperature? A) volume would increase by 12 B) volume would double C) volume would decrease by ½ D) volume would decrease by E) volume would decrease by some other factor 19. Which of the following processes always results in a decrease in the energy of a system(AE)? A) The system loses heat and does work on the surroundings. E) B) The system gains heat and has work done on it by the surroundings. C) The system gains heat and does work on the surroundings. D) The system loses heat and has work done on it by the surroundings. E) None of these is always true. 20. A sample of chlorine vapor has a density of 3.60 g/L at a temperature of -15.0°C. Calculate the pressure of the chlorine vapor at these conditions. PV =nRT (R = 0.0821 L*atm/mol*K) A) 47.5 torr E) 4585 torr B) 1635 torr C) 442 torr D) 817 torr
Transcribed Image Text:17. Which of the following would have a zero AH°? A) Hg(g) B) F(g) C) N2(g) D) He(1) E) 12(g) 18. A sample of helium gas occupies a sealed container. What would happen to the volume if the pressure was halved at a constant temperature? A) volume would increase by 12 B) volume would double C) volume would decrease by ½ D) volume would decrease by E) volume would decrease by some other factor 19. Which of the following processes always results in a decrease in the energy of a system(AE)? A) The system loses heat and does work on the surroundings. E) B) The system gains heat and has work done on it by the surroundings. C) The system gains heat and does work on the surroundings. D) The system loses heat and has work done on it by the surroundings. E) None of these is always true. 20. A sample of chlorine vapor has a density of 3.60 g/L at a temperature of -15.0°C. Calculate the pressure of the chlorine vapor at these conditions. PV =nRT (R = 0.0821 L*atm/mol*K) A) 47.5 torr E) 4585 torr B) 1635 torr C) 442 torr D) 817 torr
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