Kinetics & Equilibrium Practice TEST

What is equal in equilibrium reactions?

• The concentrations of products and reactants

• the products equals the heat of reaction

• the rate of the forward and reverse reaction

• the heat of reaction equals the activation energy

When temperature is increased, the reaction shifts to the left.  This reaction must be

• exothermic
• endothermic

Tags

NGSS.HS-PS1-4

CaCO3 --> CaO + CO2

If pressure is increased, which way does the reaction shift?

• toward products
• toward reactants
• no change

At what time the reaction reached equilibrium?

• t₁
• t₂
• t₃
• t₄

Tags

NGSS.HS-PS1-6

For the reaction...
N₂  +  O₂  <=>  2NO
If  O₂ is removed, the  concentration of N₂ will _______.

• increase
• decrease
• remain the same
• double

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

For the reaction...
SO₂ + O₂ <=>  SO₃
If the equilibrium position shifts to the right, the concentration of O₂ will ___________.

• increase
• decrease
• remain the same
• double

Tags

NGSS.HS-PS1-6

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

• gaseous
• liquid
• solid

For the reaction...
H_{2 (g)}  + Cl_{2 (g)} <=>  2HCl _(g)  +  heat
If the pressure in the system is increased, the equilibrium position will _______.

• shift to the left
• shift to the right
• not shift position at all as 2 mol gas <=> 2 mol gas

Tags

NGSS.HS-PS1-6

Which statement correctly describes an endothermic chemical reaction?

• The products have lower potential energy than the reactants, and the ΔH is positive

• The products have lower potential energy than the reactants, and the ΔH is negative

• The products have higher potential energy than the reactants, and the ΔH is positive

• The products have higher potential energy than the reactants, and the ΔH is negative

Tags

NGSS.HS-PS1-4

The potential energy diagram below represents a reaction.

Which arrow represents the activation energy of the forward reaction

• A

• B

• C

• D

Tags

NGSS.HS-PS1-4