Chapter 13

A sealed rigid vessel contains Bao2(s) in equilibrium with BaO(s) and 02(g) as represented by the equation above. which of the following changes will increase the amount of Ba02(s) in the vessel?

A. adding a small amount of o2(g)

Based on the data above, What is the value of delta g for this reaction

A. delta g<0

The reaction mixture represented below is at equilibrium at 298 K, and the molar concentrations are [X]=1.0 molar,[y]=5.0 molar and [z]= 5.0 molar. what is the value of the eqilibrium constant for the reaction at 298 k?

B. 5.0

At 450c, 2.0 moles each of H2(g), I2(g), and HI(g) are combined in in a 1.0L rigid container. The value of Kc at 450 is 50. Which of the following will occur as the system moves toward equilibrium?

B. More HI(g) will form

At 1 mol sample of C0(g) and a 1 mol sample of H2(g) are pumped into a rigid, previously evacuation 2L reaction vessel at 483K. which of the following is true at equilibrium

B. [H2] < [CO]

Which of the following explains the effect on the equilibrium constant,Kc, when the temperature of the reaction system is increased to 650K?

C. Kc will decrease because the reaction is exothermic

Which of the following statements are true about bond energies in this reaction?

C. The energy absorbed as the bonds on the reactants are broken is less than the energy released as the bonds in the product are formed.

at a certain point in time, a 1.00 L rigid reaction vessel contains 1.5 mol of pcl3(g), 1.0 mole of cl2(g) and 2.5 mol of pcl5(g). which of the following describes how the measured pressure in the reaction vessel will change and why it will change that way as the reaction system approaches equilibrium at constant temperature?

C. the pressure will decrease because Q<Kc

For which of the following reaction mixtures at equilibrium would reducng the volume of the container at constant temperature cause the equilibrium to shift towards the products?

D. 2No2(g) - N2O4(g)

At 25c, the equilibrium constant (kc) for the reaction represented above has the value of 1.3. At 50c, the value of the equilibrium constant is less than 1.3. based on this information, which of the following must be correct?

D. At 25c, Delata H for the reaction is negative

The reaction system represented above is a equilibrium. Which of the following will decrease the amount of CaO(s) in the system

D. Removing some CaCo3(s) at constant pressure