Equilibrium Unit Exam

For the equilibrium reaction
2NH₃(g) + 22 kJ ↔ N₂(g) + 3H₂(g),
which of the following changes would result in the formation of more N₂ and H₂ at equilibrium?

• increasing pressure
• increasing temperature
• adding N₂
• removing NH₃

2.In the Haber process, gaseous ammonia is produced on an industrial scale by combining nitrogen and hydrogen gases, according to this equation: 
N₂(g) + 3H₂(g) ↔ 2NH₃(g)
The process is exothermic. Which of the following actions will shift the reaction in the forward (product) direction?

• Decrease the pressure of the reaction.
• Increase the temperature of the reaction.
• Reduce ammonia concentration by removing ammonia from the reaction chamber.
• Reduce hydrogen concentration by reducing the amount of hydrogen in the reaction chamber.

Tags

NGSS.HS-PS1-5

Increasing the pressure on the reaction:
2NO_{2 (g)} ↔ N₂O_{4 (g)}
will:

• shift the reaction to the left towards the reactants, making more of the reactants.
• shift the equilibrium to the right towards the products, making more of the product.
• Have no effect on equilibrium.

Tags

NGSS.HS-PS1-6

For the reaction...
SO₂ + O₂  <−>  SO₃
If the concentration of SO₂ is increased, the equilibrium of the reaction will shift ___________.

• left
• right
• left and right 
• neither left nor right

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

For the reaction...
SO₂ + O₂ <−>  SO₃
If the concentration of O₂ is decreased, the equilibrium of the reaction will shift ___________.

• left
• right
• left and right
• neither left nor right

Tags

NGSS.HS-PS1-5

For the reaction...
heat  +  N₂  +  O₂  <−>  2NO
If  NO is removed  from the system, the concentration of N₂ will _______.

• increase
• decrease
• remain the same
• double

Tags

NGSS.HS-PS1-5

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

Tags

NGSS.HS-PS1-6

For the reaction...
H_{2 (g)}  + Cl_{2 (g)} <−>  2HCl _(g)  +  heat
If the temperature is cooled, the _________ reaction will be favored.

• forward
• reverse
• forward and reverse

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

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 decreased,  which substance will increase in concentration?

• N₂
• H₂
• N₂ and H₂
• NH₃