LeChatelier's Principle HW

Given the reaction at equilibrium:

N₂(g) + O₂(g) ↔ 2NO(g)

If the temperature remains constant and the pressure increases, the number of moles of NO(g) will

• increase

• decrease

• remain the same

Consider the following reaction:

2 SO₂(g) + O₂(g) ↔ 2 SO₃(g) + heat

The concentration of SO₃(g) will be increased by

• removing SO₂

• removing O₂

• decreasing pressure

• decreasing temperature

Given the equation representing a reaction at equilibrium:

N₂(g) + 3H₂(g) 🡪 2NH₃(g) + 91.8 kJ

Which change causes the equilibrium to shift to the right?

• removing H₂(g)

• decreasing pressure

• adding more N₂(g)

• increasing temperature

What is the effect of changing the concentration of one of the reactants in an equation at equilibrium?

• the reaction will stay at equilibrium
• the reaction will stop
• the reaction will continue to completion
• the reaction will shift to re-establish equilibrium.

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

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...

SO_2(g) + O_2(g) <−> SO_3(g)

If the equilibrium shifts to the right, the concentration of SO_3(g) will ___________.

• increase

• decrease

• remain the same

For the reaction...
SO_2(g) + O_2(g) <−>  SO_3(g)
If the concentration of O_2(g)  is decreased, the equilibrium of the reaction will ___________.

• shift to the left
• shift to the right
• not shift

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

For the reaction...

SO_2(g) + O_2(g) <−> SO_3(g)

If the equilibrium shifts to the left, the concentration of SO_3(g) will ___________.

• increase

• decrease

• stay the same

For the reaction N₂(g) + 3H₂(g) <--> 2NH₃(g) + 92 kJ;

what happens to the equilibrium position by heating up the chamber this takes place in?

• Shifts to the left (reactants)

• Shifts to the right (products)

• No effect

Define chemical equilibrium.

• A reaction is reversible.
• The concentration of the reactants is equal to the concentration of the products.
• The rate of a forward reaction is equal to the rate of the reverse reaction.
• The reaction stops and no further change in concentration occurs.

Tags

NGSS.HS-PS1-6