Chemistry/Tutorials

=Tutorial 1= 1. Consider the following reaction:

N2 (g) + 3H2(g) <=> 2NH3 (g) ∆H = -ve

State 2 conditions which might be chnaged to increase the yield of ammonia gas.

Answer 1.1

2. (a) What is meant by a reversible reaction? (b) An increase in temperature of the following reversible reaction causes more of the CuSO4 (aq) to be formed. What can be deduced about the enthalpy of the reaction? Explain your deductions.

CuSO4 (aq) <=> CuSO4. 5H2O

Answer 1.2

3. Colourless N2O4 is in equilibrium with brown NO2 according to the following equation.

N2O4 <=> 2NO2

If the mixture is in a syringe and compressed, state what will be observed and explain the observations using Le Chatelier's Principle.

Answer 1.3

=Tutorial 2= 1. State the conditions required for the Haber process

Answer 2.1

2. Explain why a compromise temperature is said to be used for the Haber process.

Answer 2.2

=Tutorial 3= 1. Explain the conditions used in the contact process.

Answer 3.1

2. Describe the steps for the manufacture of sulphuric acid

Answer 3.2

=Tutorial 4= 1. Write expressions for Kc for each of the following:
 * 1) N2(g) + 3H2(g) <=> 2NH3(g)
 * 2) I2(s) <=> I2(g)
 * 3) I2(g) + H2(g) <=> 2HI(g)
 * 4) N2O4(g)<=> 2NO2(g)

Answer 4.1

2. Calculate units for the following reactions:
 * 1) N2(g) + 3H2(g) <=> 2NH3(g)
 * 2) I2(s) <=> I2(g)
 * 3) I2(g) + H2(g) <=> 2HI(g)
 * 4) N2O4(g)<=> 2NO2(g)

Answer 4.2