Answer to Question #346988 in Chemistry for micheal

Question

A. State Le Chatelier’s Principle. (1 mark)

B. Explain how the presence of a catalyst affects a system at chemical equilibrium.(2 marks)

C. State the effect of increasing total pressure on the equilibrium conditions for a chemical equation that has:

i. more moles of gaseous products than gaseous reactants.

ii. more moles of gaseous reactants than gaseous products.

iii. the same number of moles of gaseous reactants and gaseous products. iv. all its reactants and products as pure solids and pure liquids.

D. For the Haber process N2(g) + 3H2(g) ⇌ 2NH3(g),

i. write the equilibrium expressions for Kc and Kp.

ii. calculate a value for Kc given that nitrogen and hydrogen are placed in an empty 5.00 dm3 container at 100 oC. When equilibrium is reached, the moles present are NH3 = 0.600 mol, N2 = 3.00 mol and H2 = 1.85 mol.

iii. write the relationship between Kc and Kp and use it to find a value for Kp at 100 oC, having determined a value for Kc at B ii. [R = 0.0821 (atm L)/(mol K)]. (5 marks)