3. For the chemical reaction shown in Table 1, calculate the heat effect (DN), entropy change (DS), Gibbs free energy change (DG) and equilibrium constant (Kp) at temperature T = 398K. Determine the direction of the chemical reaction occurring in a gaseous medium of a given composition. Partial pressures of the gas mixture components are given in the table
Composition of the initial gas mixture Partial pressures of the mixture components, atm
A B C D RA RV RS RD
2 3 4 5 6 7 8 9
4HCl
O2
2H2O
2Cl2
1.1 2.5 0.5 1.4
Analyze the results and answer the following questions:
1. Which substances, initial substances or reaction products, will be more in the equilibrium mixture?
2. What do the phrases mean: "the equilibrium is shifted towards the initial substances" and "the equilibrium is shifted towards the reaction products"?
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