Equilibrium and Rates of Chemical Reactions

N2 + 3H2 <------>2 NH3 + heat

An increase in temperature will produce

• more NH3

• less NH3

• a shift to the right

• less N2

Tags

NGSS.HS-PS1-5

H2 + I2 <-------> 2HI

What is the Keq of the following reaction, if the concentrations at equilibrium are [H₂]=0.7, [I₂]=0.3 and [HI]=0.6?

• 1.7

• 0.5

• 2.9

• 0.15

If the Keq = 0.65

• the forward reaction is favored

• the reverse reaction is favored

• not enough information is given

2 H2S <------> 2 H2 + S2

When the contents were analyzed they were 0.6 mole of H₂S and 0.80 mole S₂ in a 1L container and Keq = 0.016. What is the concentration of H2?

• 0.007

• 0.08

• 0.04

• 0.2

What are [A] and [B]?

• concentration of reactants
• concentration of products
• energy of reactants
• energy of products

Tags

NGSS.HS-PS1-5

Which of the following is true about chemical reaction at equilibrium

• only the forward reaction stops

• only the reverse reaction stops

• both forward and reverse reactions stop

• the rate constants for the forward and reverse reactions are equal

• the rates of the forward and reverse reactions are equal

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

Which of the two graphs reaches equilibrium?

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

This symbol indicates that a reaction is ____________

• reversible
• irreversible

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

• gaseous
• liquid
• solid
• plasma

Which of the following is NOT true at equilibrium?

• The forward and reverse reactions proceed at the same rate.

• The amount (concentration) of reactants and products do not change.

• The amount (concentration) of the reactants is equal to the concentration of the products.

• The forward and reverse reactions continue to occur.

Tags

NGSS.HS-PS1-6