Thermodynamics Consider the following reaction A+B+C AH = 57.4 kJ AS = 4.32 kJ/K DG= 7. If AH = 57.4 kJ for a chemical reaction, that reaction A. is exothermic B. is endothermic C. Spontaneous D. cannot occur 8. If AS = 4.32 kJ/K, entropy A. Increases B. Decreases C. Stays the same D. Cannot answer from information given. 9. If the reaction occurs at 10.2 K, what is the AG of the reaction? A. 13.3 kJ and spontaneous B. 13.3 kJ and non-spontaneous C. -13.3 kJ and spontaneous D. 101.4 kJ and spontaneous E. Cannot answer from information given = Chemical equilibria 10. Write the equilibrium expression for 2NO(g) + 2H2(g) = N2(g) + 2H2O(g). A. Keq = [NO]2 [H2]? / [H2O]? [N2] B. Keq = [H2O]? [N2] / [NO]? [Hz]? C. Keq = [N2] / [NO]2 [H2] 11. If the reaction quotient is greater than the equilibrium constant, which statement would be correct? A. If Q> K, then the reaction needs to proceed towards the right to reach equilibrium. B. If Q>K, then the reaction needs to proceed towards the left to reach equilibrium. C. If Q>K, then the reaction is at equilibrium. D. None of these is correct