Chemical Equilbrium

dynamic equilibrium

• condition of continuous, random movement of particles but no overall change in concentration of materials
• the process by which one or more substances change to produce one or more different substances
• a condition where the reaction occurring in a system is completely halted and there exists no movement between the reactants and the products corresponding to the chemical reaction
• a substance that takes part in and undergoes change in a chemical reaction

forward reaction

• the substance that does the dissolving
• the reaction that forms products from reactants
• to produce
• the reaction that forms reactants from products

At what time does the reaction reach equilibrium?

• t₁
• t₂
• t₃
• t₄

It is a chemical reaction where the reactants form products and the products form reactants.

• reversible reaction

• nonreversible reaction

• decomposition reaction

• standard reaction

Tags

NGSS.HS-PS1-6

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

• a is the amount (concentration) of reactants and b is the concentration of products

• a is the amount (concentration) of products and b is the concentration of reactants

• a is the volume of reactants and b is the volume of products

• a is the mass of reactants and b is the mass of products

Tags

NGSS.HS-PS1-5

At what time (in seconds) is equilibrium established?

• 0 seconds
• 1 second
• 5 seconds
• 10 seconds

Tags

NGSS.HS-PS1-5

Which of the two graphs reaches equilibrium?

• The left one.
• The right one.
• Both of them.
• Neither.

During equilibrium, the amount of the products and the amount of the reactants are __________.

• equal

• constant (unchanging)

• constantly increasing

• constantly decreasing

Tags

NGSS.HS-PS1-6

CH₃COOH(l) + CH₃OH(l) ⇌ CH₃COOCH₃(l) + H₂O(l)

What is the unit of its Kc?

• no unit

• mol³L^-9

• mol³L^-3

• molL^-1

The equilibrium constant, K_c for the chemical reaction below is 0.014 M at 900°C.

C(s) + CO₂(g) ⇌ 2CO(g)

Determine the value of K_p for the above reaction at the same temperature.

• 1.35 atm

• 0.014 atm

• 0.742 atm

• 1.00 atm