Chem Equilibrium

When two reactions are added, then their equilibrium constants are:

• multiplied

• added

• subtracted

• none of the above

When the reaction is reversed,

• K for the reverse equals K for the forward reaction

• K for the reverse is the negative of K for the forward reaction

• K for the reverse is the reciprocal of K for the forward reaction

Forward reaction is favored when

• K is less than 1

• K is greater than 1

• K is equal to zero

When K_eq > 1, 

• There are more products than reactants when the reaction reached equilibrium.
• There are more reactant than products when the reaction reached equilibrium.
• The amount of reactants is equal to the amount of products.

What is the equilibrium expression for:
Fe₃O₄(s) + 4H₂(g) <--> 3Fe(s) + 4H₂O(g)

• ([Fe]³[H₂O]⁴ ) / ([Fe₃O₄][H₂]⁴)

• ([Fe₃O₄][H₂]⁴)/ ([Fe]³[H₂O]⁴)

• [H₂O]⁴ / [H₂]⁴

• ([Fe][H₂O]) / ([Fe₃O₄][H₂])

What is the effect of increasing the pressure on the following reaction:

2NO + O₂ ---> 2NO₂?

• The yield of NO₂ increases

• The yield of NO₂ decreases

• The reaction is slower

• The concentration of O2 increases.

For the reaction...
N_{2 (g)} +  3 H_2 (g) <−> 2 NH_{3 (g)}

If the pressure in the system is decreased,  which substance will increase in concentration?

• N₂
• H₂
• N₂ and H₂
• NH₃

For the reaction...
N_{2 (g)} +  3 H_2 (g) <−> 2 NH_{3 (g)}

If the pressure in the system is increased,  which substance will increase in concentration?

• N₂
• H₂
• N₂ and H₂
• NH₃

For the reaction...
N_{2 (g)} +  3 H_2 (g) <−> 2 NH_{3 (g)}

If the pressure in the system is increased,  _______ reaction will be favored.

•  the forward
• the reverse
• neither

For the reaction...
H_{2 (g)}  + Cl_{2 (g)} <−>  2HCl _(g)  +  heat
If the pressure in the system is increased, the equilibrium will _______.

• shift left
• shift right
• not shift