Find the standard entropy of the universe for the following reaction at 298K.
CH4(g) + 2 O2(g)----> CO2(g) + 2 H2O (g)
Is the reaction spontaneous? Explain.
Find the standard entropy of the universe for the following reaction at 298K. CH4(g) + 2...
Calculate the standard-state entropy for the following reaction: 1 CH4(g) + 2 O2(g) ⟶ 1 CO2(g) + 2 H2O(l) (If applicable, coefficients of one have been included for clarity.) The standard entropy values are given in the table. Formula S∘ J/(K⋅mol) CO2(g) 214 H2O(l) 189 CH4(g) 186 O2(g) 205
At 25 °C, the following reaction is CH4(9) + 2O2(g) + CO2(g) + 2 H2O(1) Nonspontaneous due to unfavorable enthalpy Spontaneous with favorable enthalpy and entropy Spontaneous with favorable enthalpy change Spontaneous with favorable entropy change
20. Which of the following statements is FALSE? A. The entropy of the universe increases during spontaneous processes. B. During chemical and physical changes, energy is conserved. C. The entropy of H2O liquid is greater than the entropy of H2O solid at 0°C. D. The entropy of O2(g) should be greater than the entropy of CO2(g) when at the same temperature, E. The absolute entropy of a substance generally decreases when temperature decreases.
Predict the signs, comment and then calculate the enthalpy and entropy changes for the reaction of combustion ofmethane at 500 K. Will the reaction be spontaneous at 500 K? CH4(g) + 2 O2(g) → CO2(g) + 2H2O(g) We give: The enthalpies of formation of the products at 298.15 K in kJ/mol are: ∆Hf(CO2) = - 393.51; ∆Hf(H2O) = - 241.82; ∆Hf(CH4) = -74.81. The heat capacities at constant pressure in J.mol-1.K-1: Cp(CO2) = 37.11; Cp(H2O) = 33.58; Cp(CH4) = 35.31;...
Consider the reaction: 2SO2(g) + O2(g)2SO3(g) Using standard absolute entropies at 298K, calculate the entropy change for the system when 2.11 moles of SO2(g) react at standard conditions. S°system = J/K
Consider the reaction 2SO2(g) + O2(g)2SO3(g) Using standard thermodynamic data at 298K, calculate the entropy change for the surroundings when 2.11 moles of SO2(g) react at standard conditions. S°surroundings = J/K
1. The 2nd Law of Thermodynamics states that the entropy of the universe ____ 2. Determine the ∆Gº using Appendix G for the following reaction. C2H5OH(l) + 3 O2(g) --> 2 CO2(g) + 3 H2O(l) Report your answer to four sig figs. Omit unit labels. Only add a - number is the sign is negative. Adding a + to a positive answer messes up the grading.
CHANGES IN ENTROPY OF UNIVERSE VS SYSTEM. Evaluating Spontaneity Considering both Entropy and Enthalpy 7. In a spontaneous process, which of the following always increases? a. the entropy of the system b. the entropy of the surroundings c. the entropy of the universe d. the entropy of the system and the universe c. the entropy of the system, surroundings and the universe (Hand S refer to the system), a. AH>0 8. Processes are always spontaneous, regardless of temperature, when and...
Consider the reaction: 4HCl(g) + O2(g)2H2O(g) + 2Cl2(g) Using standard absolute entropies at 298K, calculate the entropy change for the system when 1.84 moles of HCl(g) react at standard conditions. S°system = J/K
Calculate the standard-state entropy for the following reaction: 6 CO2(g) + 6 H2O(l) ⟶ 1 C6H12O6(s) + 6 O2(g) (If applicable, coefficients of one have been included for clarity.) The standard entropy values are given in the table. Formula S∘ J/(K⋅mol) C6H12O6(s) 212 O2(g) 205 CO2(g) 214 H2O(l) 189