Equilibrium

An equilibrium constant with a large magnitude indicates…

• A very fast reaction
• Higher concentration of products at equilibrium
• Higher concentration of reactants at equilibrium
• Nothing, without considering the stoichiometry of the reaction

Le Chatelier's Principle states that if a chemical system at equilibrium is stressed,

• the system will adjust to increase the stress
• the system will adjust to reduce the stress
• the system will not adjust

When writing an endothermic reaction, heat energy is stated as a

• product
• catalyst
• reactant
• Spicy Switze

Tags

NGSS.HS-PS1-4

Changes in pressure will only affect substances that are in the __________ state.

• gaseous
• liquid
• solid
• plasma

What is the activation energy?

• The quantity of heat absorbed in a reaction
• The minimum energy needed to begin a reaction
• The energy given off after reactants collide.
• The energy difference between reactants and products

How do catalysts increase the rate of reaction?

• The frequency of collisions is the increased
• The activation energy is lowered
• The energy of collisions is increased
• Both the frequency and energy of collisions is increased

What are the two factors to look for when determining if the reaction is at equilibrium?

• Forward reaction rate is faster than the reverse and concentrations are equal
• Forward and reverse reaction rates are equal and concentration is constant
• Forward and revers reaction rates are equal and concentration is equal
• Forward reaction rate is faster than the reverse and concentration is equal

Tags

NGSS.HS-PS1-6

This symbol indicates that a reaction is ____________

• reversible
• irreversible

Tags

NGSS.HS-PS1-6

When the rate of the forward reaction is equal to the rate of backward reaction, the system is said to be in

• Chemical Equilibrium
• Chemical Balance
• Stoichiometry
• Chemical Reaction

Identify the labels (a) and (b) on the graph.

• a is concentration of reactants and b is the concentration of products
• a is concentration of product and b is the concentration of reactant
• a is the volume of reactants and b is the volume of product
• a is the mass of reactants and b is the mass of product

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-7