A 0.680 mol sample of SO3 is introduced into a reaction container and allowed to reach equilibrium at temperature T.
2SO3 (g) ⇌ 2SO2 (g) + O2(g)ΔH = +196 kJ mol-1
The value of Kc for the reaction was 7.9 x 10-3mol dm-3.
The size of the container for the reaction is increased. State the effect if any on the equilibrium constant, Kc, and the position of equilibrium. Justify your answer.
The temperature of the reaction in part (a) is increased. State the effect, if any, on the equilibrium constant, Kc, and the position of equilibrium. Justify your answer.
A mixture in a container at temperature, T, is allowed to reach equilibrium.
2E (g) ⇌ 2F (g) + G (g)ΔH = -143 kJ mol-1
The value of Kc for the reaction at T is 2.98 mol dm-3. Comment on the relationship between the concentration of the reactant E and products F and G with regards to Kc.
Diesters are compounds often used as synthetic lubricants for machinery such as compressors. The reaction below shows the formation of a diester from propanoic acid and propane-1,3-diol.
2CH3CH2COOH + HOCH2CH2CH2OH ⇌ C9H16O4+ 2H2O
The value for Kcat temperature, T, is 1.29.
The forward reaction is slightly exothermic. At a different temperature, T1, the value for Kc increases to 22.78.
State whether the new temperature, T1, is higher or lower than the original temperature. Justify your answer.
