Use data given below to calculate ΔrS∘ΔrS∘ for each of the
reactions.
Standard Thermodynamic Quantities for Selected Substances at 25
∘C∘C
Substance | ΔrS∘ΔrS∘, JK−1mol−1JK−1mol−1 |
Cr(s)Cr(s) | 23.8 |
Cr2O3Cr2O3(s)(s) | 81.2 |
CO(g)CO(g) | 197.7 |
CO2(g)CO2(g) | 213.8 |
H2(g)H2(g) | 130.7 |
H2O(g)H2O(g) | 188.8 |
H2O(l)H2O(l) | 70.0 |
HNO3(aq)HNO3(aq) | 146.0 |
N2(g)N2(g) | 191.6 |
N2O4(g)N2O4(g) | 304.4 |
NO(g)NO(g) | 210.8 |
NO2(g)NO2(g) | 240.1 |
O2(g)O2(g) | 205.2 |
SO2(g)SO2(g) | 248.2 |
SO3(g)SO3(g) | 256.8 |
A)
4NO2(g)+2H2O(l)+O2(g)→4HNO3(aq)
B)
Cr2O3Cr2O3(s)(s) +3CO(g)→2Cr(s)+3CO2(g)
C)
SO2(g)SO2(g) +12O2(g)→SO3(g)
D)
N2O4(g)+4H2(g)→N2(g)+4H2O(g)
Use data given below to calculate ΔrS∘ΔrS∘ for each of the reactions. Standard Thermodynamic Quantities for...
Use standard enthalpies of formation (in Appendix G in text) to calculate ∆H°rxn for each reaction. ∑ m∆H°f (products) - ∑n∆H°f (reactants), where m and n are coefficients. C2H4(g) + H2(g) ----- > C2H6(g) CO (g) + H2O (g) ----- > H2(g) + CO2(g) 3NO2(g) + H2O (l) ----- > 2HNO3(aq) + NO (g) 2SO2(g) + O2(g) -----------> 2SO3(g) 2C4H10 (g) + 13O2 (g) -----------> 8CO2 (g) + 10H2O (g) Substance --- ΔH° (kJ mol–) --- ΔG° (kJ mol–1) --- S°298 (J K–1 mol–1) C2H4 52.4 86.4 219.3 H2 0 0 130.7 C2H6 -84.0 -32.0 229.2 CO -110.52 -137.15 197.7 H2O -285.83 -237.1 70.0 CO2 -393.51 -394.36 213.8 NO2 33.2 51.30 240.1 NO 90.25 87.6 210.8 SO2 -296.83 -300.1 248.2 O2 0 0 205.2 SO3 -395.72 -371.06 256.76
Use data from the table below to calculate the equilibrium constants at 25∘C for each reaction. Standard Thermodynamic Quantities for Selected Substances at 25∘C Substance ΔH∘f(kJ/mol) ΔG∘f(kJ/mol) S∘(J/mol⋅K) H2(g) 0 0 130.7 N2(g) 0 0 191.6 O2(g) 0 0 205.2 NO(g) 91.3 87.6 210.8 NO2(g) 33.2 51.3 240.1 CO(g) -110.5 -137.2 197.7 CO2(g) -393.5 -394.4 213.8 H2S(g) -20.6 -33.4 205.8 S2(g) 128.6 79.7 228.2 1. N2(g)+O2(g)⇌2NO(g)
Using Thermodynamic Data (∆Hf), calculate the enthalpy change (∆Hrxn) for the following reactions: Fe2O3 (s) + H2 (g) → Fe (s) + H2O (l) N2H3CH3 (l) + N2O4 (l) → H2O (g) + N2 (g) + CO2 (g) C6H12O6 (s) + O2 (g) → CO2 (g) + H2O (g)
At constant pressure for which of the reactions shown below should ΔH° be greater than ΔE° ? I. 2 SO2(g) + O2(g) → 2 SO3(g) II. C23H48(g) + 35 O2(g) → 23 CO2(g) + 24 H2O(l) III. H2(g) + Cl2(g) → 2 HCl(g) IV. N2O4(g) → 2 NO2(g)
Which of the following reactions is an oxidation-reduction reaction? A) NH4HS(s) → NH3(g) + H2S(g) B) 2 NaHCO3(s) → Na2CO3(s) + H2O(g) + CO2(g) C) N2O4(g) → 2 NO2(g) D) 2 SO2(g) + O2(g) → 2 SO3(g) E) 2 HC2H3O2(aq) + Ba(OH)2(aq) → Ba(C2H3O2)2(aq) + 2 H2O(l)
Thermodynamic properties of pure substances Standard thermodynamic quantities for selected substances at 25 ° C listed alphabetically by most important atom. substance Δ Hf ° (kJ/mol) Δ Gf ° (kJ/mol) S ° (J/mol∙K) Aluminum Al3+ (aq) --- -485.0 --- Al (s) 0 0 28.3 Al2O3 (s) -1675.7 -1582.3 50.9 Al(OH)3 (s) --- -1147.25 --- Bromine Br− (aq) --- -104.0 --- Br2 (l) 0 0 152.2 Br2 (g) 30.9 3.1 245.5 HBr (g) -36.3 -53.4 198.7 Calcium Ca2+ (aq) --- -553.6...
Use the table to calculate the energy change in J/K of each reaction below (assume standard thermodynamic conditions 1.00 atm and 298.15 K) Substance S (J.mol -1. K -1 Br2 (l) 152.23 HBr (g) 198.59 C (diamond) 2.38 CH4 (g) 186.2 CH3OH (l) 126.8 CO (g) 197.6 CO2 (g) 213.6 O2 (g) 205.0 H2 (g) 130.6 H2O (g) 188.7 N2 (g) 191.5 NO (g) 210.7 NH3 (g) 192.3 NO (g) 210.7 NO2 (g) 240.0 K2CO2 (s) 155.52 KOH (s) 78.91 S (rhombic) ...
Thermodynamic Data at 25 C Substance CH4 (B) (kJmol AHof 74.6 -110.5 AGof 50.5 -137.2 S (Jmol 'K) 186.3 CO (B Cl2 (g) Cu (s) 197.7 223.1 33.2 42.6 Cuo (s) 157.3 -129.7 202.8 -92.3 -273.3 285.8 241.8 -173.23 -20.6 -95.3 -275.4 -237.1 -228.6 -79.9 33.4 186.9 173.8 70.0 188.8 155.6 205.8 HF H20 (9) HNO3 (1) 91.3 33.2 81.6 45.9 87.6 51.3 103.7 -16.4 191.6 210.8 240.1 220.0 192.8 NO2 (8) NH3 02 205.2 42.6 140.9 AgNO3 (s) 124.4...
The standard enthalpy change for the reaction of SO3(g) with H2O(l) to yield H2SO4(aq) is ΔH∘ = -227.8 kJ .? Use the following information S(s)+O2(g)→SO2(g), ΔH∘ = -296.8kJ SO2(g)+12O2(g)→SO3(g) , ΔH∘ = -98.9kJ to calculate ΔH∘f for H2SO4(aq) (in kilojoules per mole). [For H2O(l),ΔH∘f = -285.8kJ/mol]. Express your answer using four significant figures.
Calculate the ΔG°rxn at 298 K using the following information. 2 HNO3(aq) + NO(g) → 3 NO2(g) + H2O(l) ΔG°rxn = ? ΔH°f (kJ/mol) -207.0 91.3 33.2 -285.8 S°(J/mol∙K 146.0 210.8 240.1 70.0