At , a chemical reaction in an open beaker releases of heat to the surroundings. The…

CHEMISTRY · Single correct · AP · Chemistry · Thermodynamics and Electrochemistry · Thermodynamics and Electrochemistry

Problem

At 298 K298\,\text{K}, a chemical reaction in an open beaker releases 5.0 kJ5.0\,\text{kJ} of heat to the surroundings. The measured entropy change of the reacting system is −12.0 J K−1-12.0\,\text{J K}^{-1}. Which statement correctly characterises the process? (a) Reversible because ΔSuniv=0\Delta S_{\text{univ}} = 0 (b) Spontaneous because ΔSuniv>0\Delta S_{\text{univ}} > 0 (c) Impossible because ΔSuniv<0\Delta S_{\text{univ}} < 0 (d) Cannot be decided without knowing the Gibbs free energy

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