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Second and Third Laws of Thermodynamics

Q. Which of the following process are spontaneous? A hot drink cooling to room temperature. a) spontaneous b) nonspontaneous

Solved • Mar 1, 2020

Second and Third Laws of Thermodynamics

Q. Which of the following processes is necessarily driven by an increase in the entropy of the surroundings? Check all that apply. a) the condensation of water b) the sublimation of dry ice c) the freezing of water

Solved • Mar 1, 2020

Second and Third Laws of Thermodynamics

Q. For the reaction H2CO(g) + O2(g) → CO2(g) + H2O(l) ΔH° = -563.3 kJ and ΔS° = -140.5 J/K The maximum amount of work that could be donw when 1.64 moles of H2CO(g) react at 309 K, 1 atm is _______ kJ. Assume ΔH° and ΔS° are independent of temperature.

Solved • Mar 26, 2020

Second and Third Laws of Thermodynamics

Q. For the reaction H2(g) + C2H4(g) → C2H6(g) ΔG° = -97.3 kJ and ΔS°= -120.7 J/K at 329 K and 1 atm. The maximum amount of work that could be done by this reaction when 2.37 moles of H2(g) react at standard conditions at this temperature is ______ kJ.

Solved • Mar 26, 2020

Second and Third Laws of Thermodynamics

Q. For the reaction 2CO2(g) + 5H2(g) → C2H2(g) + 4H2O(g) ΔH°= 46.5 kJ and ΔS° = -124.8 J/K The standard free energy change for the reaction of 2.38 moles of CO2(g) at 329 K, 1 atm would be _____ kJ. This reaction is (reactant, product) ________ favored under standard conditions at 329 K. Assume ΔH° and ΔS° are independent temperature.

Solved • Mar 26, 2020

Second and Third Laws of Thermodynamics

Q. Consider the reaction 2NO(g) + 2H2(g) → N2(g) + 2H2O(l) ffor which ΔH° = -752 kJ and ΔS° = -351.6 J/K at 298.15 K. (1) Calculate the entropy change of the UNIVERSE when 1.989 moles of NO(g) react under standard conditions at 298.15K. (2) Is this reaction reactant or product favored under standard conditions? (3) If the reaction is product favored, is it enthalpy favored, entropy favored, or favored by both enthalpy and entropy? If the reaction is reactant favored, choose 'reactant favored'.

Solved • Mar 26, 2020

Second and Third Laws of Thermodynamics

Q. Consider the reaction 2H2O(g) + 2Cl2(g) → 4HCl(g) + O2(g) for which ΔH° = 114.4 kJ and ΔS° = 128.9 J/K at 298.15 K. (1) Calculate the entropy change of the UNIVERSE when 1.644 moles of H2O(g) react under standard conditions at 298.15 K. (2) Is this reaction reactant or product favored under standard conditions? (3) If the reaction is product favored, is it enthalpy favored, entropy favored, or favored by both enthalpy and entropy? If the reaction is reactant favored, choose 'reactant favored'.

Solved • Mar 25, 2020