a) Sulfur dioxide reacts with oxygen to form sulphur trioxide as shown in the equation below: 2SO2(g) + O2(g) → 2503(g)

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A Sulfur Dioxide Reacts With Oxygen To Form Sulphur Trioxide As Shown In The Equation Below 2so2 G O2 G 2503 G 1 (83.93 KiB) Viewed 10 times

a) Sulfur dioxide reacts with oxygen to form sulphur trioxide as shown in the equation below: 2SO2(g) + O2(g) → 2503(g) i) This reaction is described as homogeneous, explain what is meant by this. (1 mark) ii) State whether the entropy change for this reaction will be positive or negative. Briefly explain your reasoning. (1 mark) iii) Using the equation for Gibbs free energy and the data in Table 4, calculate the temperature at which this reaction is feasible. Show full details of your working. Substance SO2(g) O2(g) S/JK molt 248 205 AH°/kJ mol-1 -297 0 Table 4 SO3(g) 256 -395 (6 marks) b) For a different reaction, the Gibbs free energy change was measured at a series of different temperatures, and a straight-line plot of AG vs. T was constructed. The following data was obtained from this straight- line graph: Gradient = -0.187 kJ mol-1 K-1 intercept = 222 kJ mol-1 From this data, calculate AH and AS. Show full details of your working, and state units for both values. (2 marks)