In a chemical reaction that is at equilibrium, which of the following is true?

• All of the reactants have been converted to products.

• The reaction stops even though some reactants remain.

• Forward and reverse reactions occur at the same rate.

• All of the products are gases.

Tags

NGSS.HS-PS1-6

NGSS.HS-PS1-7

In the chemical reaction shown, how could you shift the equilibrium toward water?

• increase the temperature

• increase the pressure

• decrease the amount of oxygen

• add steam to the mixture

Tags

NGSS.HS-PS1-5

A _____ reaction is a reaction in which the conversion of reactants into products and the conversion of products into reactants can happen simultaneously.

• reversible

• chemical

• exothermic

• single replacement

Tags

NGSS.HS-PS1-6

During chemical equilibrium, the reactants change into products just as fast as the products change back into reactants.

• true

• false

Tags

NGSS.HS-PS1-6

When a change is introduced to a system in equilibrium, the equilibrium shifts in the direction that relieves the change.

• true

• false

Tags

NGSS.HS-PS1-6

According to Le Châtelier’s principle, if you added heat to the system, the equilibrium would shift in the direction that _____heat from the system.

• adds

• removes

Tags

NGSS.HS-PS1-5

According to Le Châtelier’s principle, if you increased the pressure, the equilibrium would shift in the direction that _____the pressure of the system.

• increases

• decreases

Le Châtelier’s principle tells you that if you decreased the ammonia concentration by removing ammonia from the system, the equilibrium would shift in the direction that _____ammonia.

• removes

• produces

Tags

NGSS.HS-PS1-5

The synthesis of ammonia is

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

The decomposition of ammonia is

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4