Reversible and Irreversible Reactions and Chemical Equilibrium

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

What type of reactions can able to change products back to the their original form?

• Reversible reactions

• Irreversible reactions

• Combustion reactions

• Combination reactions

Tags

NGSS.HS-PS1-6

Which of the following combination is correct?

• reversible ⇌

  irreversible →

• reversible ←

  irreversible →

• reversible ⇌

  irreversible ←

• irreversible ⇌

  reversible →

This symbol indicates that a reaction is ____________

• reversible

• irreversible

For the reaction...
SO₂ + O₂  <−>  SO₃
If the concentration of SO₂ is increased, the equilibrium of the reaction will shift ___________.

• left

• right

• left and right 

• neither left nor right

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

If a reversible reaction is exothermic in the forward direction, it will be ...

• exothermic in the reverse direction

• endothermic in the forward direction too

• endothermic in the reverse direction

• not involve energy in reverse direction

Tags

NGSS.HS-PS1-4

What is the symbol which is used in reversible reactions?

• →

• Δ

• +

• ⇌

Which of the following chemical reactions is reversible?

• CH₄ + O₂ ⇌ CO₂ + H₂O

• CuSO₄.5H₂O → CuSO₄ + 5H₂O

• NH₄Cl ⇌ NH₃ + HCl

• CaCO₃ → CaO +CO₂

Tags

NGSS.HS-PS1-6

Which of the following reactions never goes completion in a closed container?

• H_{2 +} I₂ ⇌ 2HI

• C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O

• NaOH + HCl → NaCl + H₂O

• CuSO₄ + Zn → ZnSO₄ + Cu

What is a Reversible reaction

• A reaction going forward and backward at same time

• A reaction going forward and backward at different time

• forward reaction

• backward reaction

Tags

NGSS.HS-PS1-6