CHAPTER 4 CHEMICAL REACTIONS. SEMESTER 1

EXTRA QUESTIONS

1.Which statement about chemical equilibrium is true?

The forward reaction is faster than the reverse reaction at equilibrium.

The forward reaction is slower than the reverse reaction at equilibrium.

The forward reaction and the reverse reaction do not stop at equilibrium.

2.One of stages in sulfuric acid production is described by this equation: 

2SO₂(g) + O₂(g) = 2SO₃(g). What will happen to the yield of SO₃ if the pressure is increased?

It will go up.

It will go down.

It will stay the same

3.In a certain reversible reaction involving gases at equilibrium, increasing the pressure and adding a catalyst has no effect on the position of equilibrium. Which statement about the equilibrium is correct?

The forward reaction is endothermic.

The catalyst has no effect on the rate of the forward or reverse reactions.

The number of molecules of gas on the left of the equation is the same as the number on the right.

 ­­4.What is meant  by the term

a. hydrated salt

b. reversible reactions.

5.Write  a symbol equation for the change  which occurs on heating hydrated  nickel  sulfate. NiSO₄.7H₂O

6. H₂ + I₂   ═      2HI       ∆H= 9.6 Kj/mol

a.How  can you increase the amount of    HI

b. What  is the effect of increasing pressure  in the above equation.

   
http://www.docbrown.info/page04/4_74revNH3a.htm
http://www.bbc.co.uk/education/guides/z7qfr82/revision

http://chemwiki.ucdavis.edu/Physical_Chemistry/Equilibria/Chemical_Equilibria/Reversible_vs._Irreversible_Reactions
http://www.bozemanscience.com/ap-chem-062-reversible-reactions/

http://www.bbc.co.uk/schools/gcsebitesize/science/add_aqa/exothermic/exothermic_endothermicrev3.shtml