What is the free energy change for the following reaction at 25 °C if the entropy change at this temperature is 10 J/molK?

What is the free energy change for the following reaction at 25 oC if the entropy        change at this temperature is  - 10 J/molK?            3 A (g)   +  B (s)  ------    2 C (g)   +  3.40 kJ     A. - 3.30 kJ/mol   B. + 6.38 kJ/mol   C. + 0.420 kJ/mol   D. - 6.38 kJ/mol   E. - 0.420 kJ/mol

A certain reaction is spontaneous at 65 ° C. If the enthalpy change for the reaction is  15 kJ/mol,  what is the minimum value of  Δ S (in J/K · mol) for the reaction.

Calculate ΔG° for the following reactions at 25°C using the standard free energies of formation of the reactants and products.Compound ΔGof (kJmol)ΔGfo(kJmol)    The equation H2O(l) → H2O(g)  ΔGoΔGokJ C2H2(g)209.9 CO2(g)-394.4 H2O(g)-228.6 H2O(l)-237.1 N2(g)0 NO(g)87.6 O2(g)0

Calculate ΔGo in kJ for the following chemical reaction at 60oC, given the ΔHf values below, and given that the change in entropy for the reaction is EITHER (i.e. you have to choose which) positive or negative 284.5 J/mol K. NH4Cl (s)   <-->   NH3 (g)   +   HCl (g)   -314                    -45              -92      (kJ/mol)

The enthalpy and entropy changes for a reaction at 298 K are ∆H = 46 kJ and ∆S = 190 J/K. Which of the following best describes this reaction A) The reaction is spontaneous and driven by favorable changes in the enthalpy and entropy. B) The reaction is not spontaneous because heat is absorbed. C) The reaction is not spontaneoius but could be spontaneous at a higher temperature. D) The reaction is spontaneous and driven by the favorable entropy change.

The reaction N2(g) + 3 H2(g) → 2 NH3(g) is thermodynamically spontaneous at 298 K, but becomes    nonspontaneous at higher temperatures.  Which of the following is true at 298 K?   a) ΔG, ΔH, and ΔS are all positive.    d) ΔG and ΔS are negative, but ΔH is positive. b) ΔG, ΔH, and ΔS are all negative.     e) ΔG and ΔH are positive, but ΔS is negative. c) ΔG and ΔH are negative, but ΔS is positive.

Which statement is true about the relationship between entropy and spontaneity? spontaneous reactions tend to lead to higher entropy entropy is the same as spontaneity as entropy increases, spontaneity decreases as entropy increases, spontaneity is unaffected