LQ66 KE Le Chatelier's

At what time (in seconds) is equilibrium established?

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

Tags

NGSS.HS-PS1-5

Le Chaltelier'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

Tags

NGSS.HS-PS1-6

For the reaction...
SO_2(g) + O_2(g) <−>  SO_3(g)
If the concentration of SO_2(g)  is increased, the equilibrium of the reaction will ___________.

• shift to the left
• shift to the right
• not shift

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

For the reaction...
energy +  N_2(g)  +  O_2(g)  <−>  2NO_(g)
If  O_2(g) is removed, the  concentration of N₂ will _______.

• increase
• decrease
• remain the same
• double

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

A +  B <--> C + D   ΔH= 151kJ
Rewrite the above equation with energy as a reactant or product:

• A +  B <--> C + D + energy
• A +  B + energy <--> C + D 

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Which of the following will increase the amount of O2?For the reaction below;
2 SO3 (g)  +  Heat ⇋ 2 SO2 (g)  +  O2 (g)

• Adding SO3
• Adding heat
• Removing SO2
• All the above 

Consider the following reaction: 
Heat  + 2NaClO_3(s) ⇌ 2NaCl_(s) + 3O_2(g)    Which of the following will cause a shift to the right?

• adding more O₂
• adding more NaCl
• removing some NaClO₃
• increasing the temperature

Given the reaction below at equilibrium,   2 Cl₂ (g)  +  2 H₂O (g) ⇄ 4 HCl (g)  +  O₂ (g) 
∆H = + 27 kJ
Increasing the volume of the container the reaction will _________. 

• shift left
• shift right
• no change
• the reaction is exothermic

For this reaction at equilibrium, which combination of temperature and pressure would give the greatest equilibrium yield of products?

W(g) + X(g) ⇌ 2Y(g) + Z(g) ∆H = +47 kJ mol^–1

• High pressure and high temperature

• High pressure and low temperature

• Low pressure and high temperature

• Low pressure and low temperature

Tags

NGSS.HS-PS1-6

Equilibrium #1

Add a catalyst to the equilibrium

• Favor the products

• Favor the reactants

• No Effect on Equilibrium