Chap 1 questions

Chap 1 questions - Consider the following gas-phase...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Consider the following gas-phase reaction, at equilibrium, under conditions where the value of the equilibrium constant, K, is equal to 8: N 2 O 4 (g) <==> 2NO 2 (g), K = 8 Which of the following diagrams represents a snapshot of a very small portion of this system at equilibrium? Given the following reaction and equilibrium constant, which statement is correct for this reaction at equilibrium. CO 2 <==> CO + 1/2O 2 , K c1 = 9.1 x 10 -12 a. The forward rate will be the same as the reverse rate. b. The forward rate will be larger than the reverse rate. c. The forward rate will be smaller than the reverse rate. d. The concentration of CO 2 must be much smaller than the concentrations of both CO and O 2 . Given the equilibrium constants for the first two reactions below at 1000 o C, what is the equilibrium constant for the third reaction at the same temperature. (Assume that all species are in the gas phase.) CO 2 <==> CO + 1/2O 2 , K c1 = 9.1 x 10 -12 (1) H 2 O <==> H 2 + 1/2O 2 , K c2 = 7.1 x 10 -12 (2) CO 2 + H 2 <==> CO + H 2 O, K c3 = ? (3) If the following reaction were at equilibrium in a closed vessel at a controlled temperature, what would be the effect of adding more H 2 to the reaction vessel and permitting the reaction to approach equilibrium again. CO + H 2 O <==> CO 2 + H 2
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
a. The concentrations of CO, H 2 O, and H 2 would all increase. b. The concentrations of CO, H 2 O, and H 2 would all decrease. c. The concentrations of CO and H 2 O would increase and the concentration of CO 2 would decrease. d. The concentrations of CO and H 2 O would decrease and the concentration of CO 2 would increase. At 200 o C, nitrogen oxide reacts with oxygen to form nitrogen dioxide as follows: 2NO + O 2 <==> 2NO 2 , K c = 3 x 10 6 In a mixture of the three species at equilibrium, we can accurately predict that: a. The concentrations of both NO and O 2 will be much larger than the concentration of NO 2 . b. The concentrations of both NO and O 2 will be much smaller than the concentration of NO 2 . c. The concentrations of either NO or O 2 (and possibly both) will be much smaller than the concentration of NO 2 . d. The concentration of O 2 will be exactly one half the concentration of NO. e. The concentration of O 2 will be exactly twice the concentration of NO. At 200 o C, nitrogen oxide reacts with oxygen to form nitrogen dioxide as follows: 2NO + O 2 <==> 2NO 2 , K c = 3 x 10 6 If a mixture of these three gases contains 0.10 M NO, 0.10 M NO 2 , and 0.01 M O 2 , then we can accurately predict that the reaction: a. is at equilibrium. b. is not at equilibrium and must proceed from left to right to reach equilibrium. c. is not at equilibrium and must proceed from right to left to reach equilibrium. d. is not at equilibrium but insufficient information is given to predict which direction the reaction must go to reach equilibrium. e. the rate from right to left is greater than the rate from left to right.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern