An excess of H2 is placed in a sealed vessel containing equimolar mixture of F2, Cl2, Br2 and I2. Using the data provided below, which product is present in smallest the concentration at equilibrium and why? H2 (g) + F2 (g) 2HF (g) ∆G = -190 kJ mol-1 H2 (g) + Cl2 (g) 2HCl (g) ∆G = -546 kJ mol-1 H2 (g) + Br2 (g) 2HBr (g) ∆G = -106 kJ mol-1 H2 (g) + I2 (g) 2HI (g) ∆G = 4 kJ mol-1

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