Find ∆H◦, ∆S◦, and ∆G◦ for each of the following reactions. Calculate ∆H◦ − T ∆S◦ and compare it with ∆G◦ to check the consistency of the data a. CaCO3(calcite,s) + HCl(g) = CaCl2(s) + H2O(l) + CO2(g)

Find ∆H◦, ∆S◦, and ∆G◦ for each of the following reactions. Calculate ∆H◦ − T ∆S◦ and compare it with ∆G◦ to check the consistency of the data a. CaCO3(calcite,s) + HCl(g) = CaCl2(s) + H2O(l) + CO2(g)

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter16: Thermodynamics: Directionality Of Chemical Reactions

Section: Chapter Questions

Problem 115QRT

See similar textbooks

Similar questions

Use data from Appendix IIB to calculate ΔS∘rxnΔSrxn∘ for each of the reactions given. 3NO2(g)+H2O(l)→2HNO3(aq)+NO(g) Express your answer as an integer. ΔS∘rxn=____________________J/K
Write the expression for Keq for the following reactions. In each case indicate whether the reaction is homogeneous or heterogeneous. H2(g) + I2(g) 2 HI(g) Keq = 2 PHI / (PH2 PI2) Keq = PH2 PI2 / 2 PHI Keq = PH2 PI2 / PHI2 Keq = PHI2 / (PH2 PI2)
Hess’ Law: ΔH’s of Reaction Steps Add Up to ΔH(tot) [tot] Mg(s) + 1⁄2O2(g) → MgO(s) ΔH(tot) = ___________? [1] Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) ΔH1 = _______kJ [2] MgO(s) + 2HCl(aq) → MgCl2(aq) + H2O(l) [3] H2(g) + 1⁄2O2(g) → H2O(l) ΔH2 = _______kJ [3] H2(g) + 1⁄2O2(g) → H2O(l) ΔH3 = –286 kJ
What is the value of ΔG°rxn for the reaction: C--->2A+B given: 2A+B--->ΔG°rxn=150.5kJ/mol
What is the value of ∆G°(kJ mol–1 ) for this reaction at 175.4 oC ? The data refer to 25 oC: 2 NO(g) + Cl2(g) ⟶ 2 NOCl(g) Substance NO(g) Cl2(g) NOCl(g) ∆H°f (kJ mol–1) 90.29 0 51.71 ∆G°f (kJ mol–1) 86.60 0 66.07 S° (J K–1 mol–1) 210.65 223.0 261.6 (the answer should be entered with 3 significant figures; do not enter units; give answer in normal notation--examples include 1.23 and 120. and -123 and 123. and 12.3) Calculate ΔG in kJ•mol-1 at 298 K for the following reaction: under the following conditions: (the answer should be entered with 3 significant figures; do not enter units; give answer in scientific notation--valid notation examples include 1.23e-8 and 1.23e8 and -1.23e-4 and 1.23e0) P(A) = 0.397 atm, P(AB) = 0.792 atm 2 A(g) + B2(s) → 2 AB(g) ΔGo = -182 kJ•mol-1 The redox reaction below has a ΔG° value of 209. kJ. Determine the standard cell potential(E°cell) for…
Balance the equation and write the reaction quotient expression, Qc, for the following synthesis of carbon disulfide, CS2: CH4(g) + H2S(g) ⇌ CS2(g) + H2(g)
1.) Calculate ΔG'° for a reaction proceeding under biochemical standard conditions with a K'eq of 2.32. Give your answer in units of kJ/mol, but do not include the units as part of your answer (give the number only) 2.) What is the ΔG in kJ/mol for the reaction characterized in the previous question if the temperature is increased to 30°C and Q = 3.1? Again, please only give the numerical answer, do not include units.
The reaction SO2(g)+2H2S(g)⇌3S(s)+2H2O(g)SO2(g)+2H2S(g)⇌3S(s)+2H2O(g) is the basis of a suggested method for removal of SO2SO2, a pollutant that irritates airways causing coughing, from power-plant stack gases. The values below may be helpful when answering questions about the process. Substance ΔG∘fΔGf∘(kJ/mol)(kJ/mol) ΔH∘fΔHf∘(kJ/mol)(kJ/mol) H2O(g)H2O(g) −−228.6 −−241.8 H2O(l)H2O(l) −−237.1 −−285.8 SO2(g)SO2(g) −−300.4 −−296.9 SO3(g)SO3(g) −−370.4 −−395.2 H2S(g)H2S(g) −−33.01 −−20.17 S(s)S(s) 0 0 Assume that the partial pressure of sulfur dioxide, PSO2PSO2, is equal to the partial pressure of dihydrogen sulfide, PH2SPH2S, and therefore PSO2=PH2SPSO2=PH2S. If the vapor pressure of water is 24 torrtorr , calculate the equilibrium partial pressure of SO2SO2 (PSO2PSO2) in the system at 298 KK. Express the pressure in atmospheres to two significant figures. Kp= 8*10^15
The value of Delta G at 261.0oC for the formation of phosphorous trichloride from its constituent elements, P2 (g) +3Cl2 (g) -> 2PCI3 (g) is ___ kJ/mol. at 25.0oC for this reaction, delta H is -720.kJ/mol, Delta G is -642.9kJ/mol and delta s is -263.7 J/K
Table 17-1 lists common half-reactions along with the standard reduction potential associated with each half-reaction. These standard reduction potentials are all relative to some standard. What is the standard (zero point)? lf is positive for a half-reaction, what does it mean? If is negative for a half-reaction, what does it mean? Which species in Table 17-1 is most easily reduced? Least easily reduced? The reverse of the half-reactions in Table 17-1 are the oxidation half-reactions. How are standard oxidation potentials determined? In Table 17-1, which species is the best reducing agent? The worst reducing agent? To determine the standard cell potential for a redox reaction, the standard reduction potential is added to the standard oxidation potential. What must be true about this sum if the cell is to be spontaneous (produce a galvanic cell)? Standard reduction and oxidation potentials are intensive. What does this mean? Summarize how line notation is used to describe galvanic cells.
Calculate H when a 38-g sample of glucose, C6H12O6(s), burns in excess O2(g) to form CO2(g) and H2O() in a reaction at constant pressure and 298.15 K.
Nitromethane, CH3NO2, can be used as a fuel. When the liquid is burned, the (unbalanced) reaction is mainly CH3NO2(l) + O2(g) CO2(g) + N2(g) + H2O(g) a. The standard enthalpy change of reaction (Hvan ) for the balanced reaction (with lowest whole-number coefficients) is 1288.5 kJ. Calculate Hf0 for nitromethane. b. A 15.0-L flask containing a sample of nitromethane is filled with O2 and the flask is heated to 100.C. At this temperature, and after the reaction is complete, the total pressure of all the gases inside the flask is 950. torr. If the mole fraction of nitrogen (nitrogen) is 0.134 after the reaction is complete, what mass of nitrogen was produced?