FiltersDone

Question type

Essay

Multiple Choice

Short Answer

True False

Matching

Exam 14: Chemical Equilibrium-Equal but Opposite Reaction Rates

Show Answer

Share

---

All types

Filters

Study FlashcardsPractice ExamLearn

Question 31

Multiple Choice

Review LaterAdd Note

Review Later

For a chemical reaction at equilibrium,which of the following will change the value of the equilibrium constant K? (I) Changing the temperature (II) Changing the total concentration of reactants and products (III) Changing the reaction coefficients

A) I only
B) II only
C) III only
D) I and II only
E) I and III only

Correct Answer

verified

Show Answer

Question 32

Multiple Choice

Review LaterAdd Note

Review Later

In equilibrium expressions,the concentrations of pure solids and liquids __________

A) have the assigned value of one.
B) have the assigned value of zero.
C) have constant values,c_s and c₁.
D) are determined from the density and molar mass.
E) are treated as any other solute.

Correct Answer

verified

Show Answer

Question 33

Multiple Choice

Review LaterAdd Note

Cylinders of NO gas may contain small quantities of oxygen as impurities,leading to the formation of NO₂ in equilibrium with the NO and oxygen.Is this contamination by NO₂ dependent on pressure in the tank?

For the following hypothetical equilibrium,A + 2 B $\leftrightarrows$ C,what is the value of the equilibrium constant if the concentrations at equilibrium are [A] = 4.5 * 10^-5 M,[B] = 2.2 *10^-2 M,and [C] = 9.4 * 10^-3 M?

The of atomic oxygen is 230.1 kJ/mol.Determine the equilibrium constant for the following reaction at standard thermodynamic conditions: O₂(g) $\leftrightarrows$ 2 O(g) .

For a reaction to be spontaneous,the reaction quotient must be __________,the free-energy change must be __________,and the entropy change for the universe must be __________.

For a particular hypothetical reaction,2 A + B $\to$ C,the value of $\Delta$ G ^$\circ$ is 2.50 $\times$ 10² kJ/mol.What is the value of $\Delta$ G for this reaction at 298 K when [A] = 0.600 M,[B] = 0.100 M,and [C] = 4.00 $\times$ 10^-3 M?

The equilibrium constant for the acid ionization of mercaptoethanol (HSCH₂CH₂OH ) is 1.91 $\times$ 10^-10. HSCH₂CH₂OH(aq) $\leftrightarrows$ H⁺(aq) + SCH₂CH₂OH^-(aq) .Which of the following is true regarding this equilibrium? I.The reaction is product favored. II.The reaction is reactant favored. III.Equilibrium lies far to the right. IV.Equilibrium lies far to the left.

Consider the equilibrium CO(g) + 2 H₂(g) $\leftrightarrows$ CH₃OH( ) ,for which $\Delta$ H ^$\circ$ = -128.5 kJ/mol and $\Delta$ G ^$\circ$ = -29.3 kJ/mol at 298 K.Estimate the equilibrium constant at 313 K.

When can an x be ignored in solving an equilibrium expression derived from a RICE table?

Chemical equilibrium arises from the __________ of chemical reactions and is defined when the __________ of the forward reaction is equal to the __________ of the reverse reaction.

Nitrogen monoxide molecules can react to form dinitrogen oxide and nitrogen dioxide.Write the balanced reaction equilibrium using the smallest whole-number coefficients possible.Determine the equilibrium constant for this reaction under standard conditions from the following data and note whether the reaction is product favored or reactant favored. $\Delta$ G ^$\circ$ (NO,g)= 86.6 kJ/mol $\Delta$ G ^$\circ$ (N₂O,g)= 104.2 kJ/mol $\Delta$ G ^$\circ$ (NO₂,g)= 51.3 kJ/mol

For the gas-phase oxidation of sulfur dioxide,2 SO₂(g) + O₂(g) $\leftrightarrows$ 2 SO₃(g) ,K_p = 4.17 $\times$ 10² at 200.0 ^$\circ$ C.If a closed vessel is filled with SO₃ at an initial pressure of 0.033 atm at 200 ^$\circ$ C,what is the equilibrium partial pressure of SO₃?

In the equation relating equilibrium to thermodynamics,a = -RTb,

For the chemical equilibrium aA +bB $\leftrightarrows$ cC,the value of the equilibrium constant K is 10.0.What is the value of the equilibrium constant for the reaction cC $\leftrightarrows$ aA + bB?

Write the expression for the reaction quotient for the reaction,Ag⁺(aq) + 2 NH₃(aq) $\leftrightarrows$ Ag(NH₃) ₂⁺(aq)

A sketch of the free energy versus Q for a hypothetical chemical equilibrium is shown here.The stress to the equilibrium by adding more reactants is shown by which arrow?

The reaction of bromine gas with chlorine gas,Br₂(g) + Cl₂(g) $\leftrightarrows$ 2 BrCl(g) ,has a K_p value of 7.20.If 0.500 atm of both Br₂ and Cl₂ are placed in a closed vessel and allowed to come to equilibrium,what is the equilibrium partial pressure of BrCl(g) ?

Estimate K_p at 500 K to three significant figures for the reaction N₂(g)+ 3 H₂(g) $\leftrightarrows$ 2 NH₃(g),given the following data: K_p at 298 K = 6.1 $\times$ 10⁵ (NH₃,g)= -16.5 kJ/mol (NH₃,g)= -46.1 kJ/mol

Consider a reaction at a point in which the difference in free energy between the reactants and products is twice the standard free-energy change for the reaction.What expression would allow you to calculate the reaction quotient under these conditions,and what would be required for the reaction to be spontaneous?