Three elementary reactions have the following overall energy changes: Reaction 1: ;…

CHEMISTRY · Single correct · A Level · Chemistry · Thermodynamics · Thermodynamics

Problem

Three elementary reactions have the following overall energy changes: Reaction 1: ΔE=−50 kJ mol−1\Delta E = -50\,\text{kJ}\,\text{mol}^{-1}; Reaction 2: ΔE=+20 kJ mol−1\Delta E = +20\,\text{kJ}\,\text{mol}^{-1}; Reaction 3: ΔE=0 kJ mol−1\Delta E = 0\,\text{kJ}\,\text{mol}^{-1}. Based solely on these values, which reaction(s) are product-favoured at equilibrium? (a) Reaction 3 only (b) Reaction 2 only (c) Reaction 1 only (d) Reactions 1 and 3

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