consider the following reaction at 298 k 2cog o2 g 2co2 g delta s 0 1728 jmol k a calculate the

(a) To calculate the ΔH° for this reaction, we need to use the standard enthalpies of formation

Question

Consider the following reaction at 298 K: 2CO(g) + O2(g) -> 2CO2(g) ΔS° = -172.8 J/mol K (a) Calculate the ΔH° for this reaction. (b) Is the reaction spontaneous under standard conditions at 298 K? Explain. (c) At what temperature will the reaction be at equilibrium under standard conditions? Answer = _____ (d) Use the thermodynamic data on the following page to determine the standard entropy of CO2(g) at 298 K. Answer = _ (e) What is ΔG for the reaction when the pressures of CO, O2, and CO2 are 0.20, 0.20, and 0.40 atm, respectively at 298 K? Answer = _______ (f) What is ΔG at equilibrium? ΔHf° (kJ/mol) ΔGf° (kJ/mol) S° (J/mol K) Ag+(aq) 105.9 77.1 73.9 AgI(s) -62.4 -66.3 114.2 Ca2+(aq) -543.0 -553.0 -55.2 Ca(OH)2(s) -986.1 -898.6 83.4 Cl-(aq) -167.2 -131.2 56.5 CH3OH(l) -238.6 CH4(g) -75 -51 186 CO(g) -110.5 -137.3 197.9 CO2(g) -393.5 -394 H2(g) 0 0 131.0 I-(aq) 55.9 -51.7 109.37 Mg2+(aq) -462.0 -456.8 -118.0 Mg(OH)2 Na+(aq) -239.66 -261.87 60.25 NaCl(s) -411.0 -384.0 72.38 O2(g) 0 0 205.0 OH-(aq) -229.9 -157.3 -10.5 Pb2+(aq) 1.6 -24.3 21 SO2(g) -296.1 -300.4 248.5 SO3(g) -395.2 -370.4 256.2 Zn2+(aq) -152.4 -147.2 106.48 All values are at 298 K.

          Consider the following reaction at 298 K: 2CO(g) + O2(g) -> 2CO2(g)
ΔS° = -172.8 J/mol K

(a) Calculate the ΔH° for this reaction.
(b) Is the reaction spontaneous under standard conditions at 298 K? Explain.
(c) At what temperature will the reaction be at equilibrium under standard conditions? Answer = ___________
(d) Use the thermodynamic data on the following page to determine the standard entropy of CO2(g) at 298 K. Answer = ___________
(e) What is ΔG for the reaction when the pressures of CO, O2, and CO2 are 0.20, 0.20, and 0.40 atm, respectively at 298 K? Answer = ___________
(f) What is ΔG at equilibrium?

ΔHf° (kJ/mol)         ΔGf° (kJ/mol)           S° (J/mol K)
Ag+(aq)            105.9                     77.1                    73.9
AgI(s)             -62.4                     -66.3                  114.2
Ca2+(aq)           -543.0                   -553.0                -55.2
Ca(OH)2(s)       -986.1                   -898.6                83.4
Cl-(aq)             -167.2                   -131.2                56.5
CH3OH(l)         -238.6
CH4(g)             -75                         -51                     186
CO(g)               -110.5                   -137.3                197.9
CO2(g)             -393.5                   -394
H2(g)                 0                           0                      131.0
I-(aq)                55.9                       -51.7                  109.37
Mg2+(aq)           -462.0                   -456.8                -118.0
Mg(OH)2
Na+(aq)           -239.66                 -261.87              60.25
NaCl(s)             -411.0                   -384.0                72.38
O2(g)                 0                           0                      205.0
OH-(aq)             -229.9                   -157.3                -10.5
Pb2+(aq)             1.6                         -24.3                  21
SO2(g)             -296.1                   -300.4                248.5
SO3(g)             -395.2                   -370.4                256.2
Zn2+(aq)           -152.4                   -147.2                106.48

All values are at 298 K.

Added by Yolanda P.

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