System is nothing but the reaction only.
N2 + 3H2 ---> 2NH3
Delta S°(rxn) = 2 * (192.8) - 3*(130.6) - 191.5
Delta S° = - 197.7 J/K ....Answer
Let me know if any doubt.
Question 4 1 pts Calculate ASºsys for this reaction at 25°C. Input final answer in units...
Q1 Q2 Q3 Is a reaction with the following values of AH and AS spontaneous at 350 K?. AH 107 kJ AS = - 285 J/K A. The reaction is not spontaneous. B. The reaction is spontaneous. C. The reaction is at equilibrium. D. Cannot be determined Which of the following reactions represent AG°f? A. Na (s) + 1/2 F2 (g) → NaF (s) B. 2 H2 (g) + O2 (g) + 2 H20 (1) C. H30+ (aq) + OH-...
Calculate the standard entropy change for the following reaction at 25°C. 20 + 6D 4E Sº (J/mol K) 191.5 130.6 192.3 -737.2 J/K mol-rxn 794.8 J/K mol-rxn 737.2 J/K mol-rxn O-129.8 J/K mol-rxn - 794.8 J/K mol-rxn
4) Synthesis of ammonia by the Haber process occurs by the reaction N2(g) + 3H2(8) 52NH3(8) Species ah(kJ mol-1) 4S(J mol-1 K-1) H2(g) 0 130.7 N2(g) 0 191.6 NH3(g) -46.1 192.5 Assuming that AH and 45 are essentially unchanged in the temperature ranging from 25 °C to 400 °C: a. Calculate K at 25°C. b. Calculate K at 400C. (R = 8.314 J mol-1 K-1)
(2) (24 pts) A fuel cell produces electricity via a combustion reaction. A DMFC is a proton-exchange fuel cell that uses methanol CH3OH) as the fuel, which reacts with molecular oxygen to produce carbon dioxide and water. (a) (4 pts) Write the balanced combustion reaction for this methanol fuel cell. (b) (4 pts) Write the balanced half-reactions occurring at the cathode and anode of this fuel cell (assume standard acidic conditions) (e) (4 pts) Evaluate AGº (kJ) and AE° (V)...
At 298 K, evaluate deltaG(kJ) and deltaE (V) for 2CH3OH(l) + 3O2(g) -> 4H2O(g) + 2CO2(g) S (J/mol-K) AH°y (kJ/mol) So (J/mol-K) AH(kJ/mol) Substance Substance N2(g) CH-ОН() 126.8 0 191.5 -238.6 CO(g) NH3(g) 197.9 192.5 -110.5 -46.2 CO2(g) NO(g) 213.6 +90.4 210.6 -393.5 NO2(g) +33.8 240.5 H2(g) HNO3(aq) 130.6 146.0 -206.6 H2O( 69.9 -285.8 O2(g) 188.8 H2O(g) 0 205.0 -241.8
Find ΔrG for the following (in kJ mol-1) N2 (g) + 3 H2 (g) ⇌ 2 NH3 (g) The conditions for this reaction are: Temp: 298k P - NH3 = 0.95 bar P - H2 = 1.95 bar P - N2 = 1.25 bar NH3(g) ?H ∙(kJ mol-1) = -45.9 ?G ∙(kJ mol-1) = -16.4 S ∙(J K-1 mol-1)192.8 N2(g) ?H ∙(kJ mol-1) = 0 ?G ∙(kJ mol-1) = 0 S ∙(J K-1 mol-1)191.6 H2(g) ?H ∙(kJ mol-1) = 0...
9. Calculate ASⓇ, ASsurr, AStot, and AGⓇ at 298 K for the following reaction N2(g) + 3H2(g) → 2NH3(g) at 25*C. AH° = -92.22 kJ/mol Using: Smº[N2, gas) = 191.6J/(K-mol); Sm"[H2, gas) = 130.7J/(K-mol); Sm*[NH3, gas) = 192.4
Calculate the AG" value at 500 K for the reaction given below. Is the reaction voluntary under conditions where the pressure of each H2 (g) and H20 (g) gas is 1 atm each? Cu (S) + H20 (g) → CuO (S) + H2 (g) 500K AHºf (kJ/mol) Sº (J/mol K) Cu (S). 0 33.3 H2O (g.hu -241.8 188.7 CuO (S) -155.2 43.51 H2 (g) 0 130.6
Question 6 1 pts Which of the following reactions is a standard formation reaction (i.e. АHræn = AH) at T = 298 K? O 2 Fe (s) + 1.5 O2() → Fe2O3(s) O N2(1) + 2 O2(1) ► N204(1) O CO(g) + 2H2(g) + CH3OH(1) O C(s, graphite) + H2(g) + O2(g) → C6H1206(s) O Cl2(g) + H2(g) →2 HCl(g) Question 4 1 pts A sample of 1.71 moles of a substance was burned in a constant pressure calorimeter. The...
Ethanol (C2H5OH) can be prepared by many different reactions including the two shown below: (2.1) C2H4 (g) + H20 (g) + C2H5OH (1) (2.2) C2H6 (g) + H20 (g) → C2H5OH (1) + H2 (g) Using the thermodynamic data below, calculate the change in the Gibbs free energy (in units of kJ) for reaction 2.1 at 298.15 K. AG; (kJ/mol) Sº (J/mol.K) 0 H2 (g) H2O (g) C2H5OH (1) C2H4 (g) -228.6 -174.9 68.0 AH; (kJ/mol) 0 -241.8 -277.7 52.5...