For numbers 1-3, calculate the standard entropy change for the following reactions at 25°C. Use the values of entropies of the compounds found in Table 1. You may use the other side of this sheet to write your answers. 2CO(g) + O2(g) → 2CO2(g) 3O2(g) → 2O3(g) 2NaHCO3(s) → Na2CO3(s) + H2O(l) + CO2(g)

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For numbers 1-3, calculate the standard entropy change for the following reactions at 25°C. Use the values of entropies of the compounds found in Table 1. You may use the other side of this sheet to write your answers.

  1. 2CO(g) + O2(g) → 2CO2(g)
  2. 3O2(g) → 2O3(g)
  3. 2NaHCO3(s) → Na2CO3(s) + H2O(l) + CO2(g)

 

Inorganic Substances

Substance

ΔHof (kJ/mol)

ΔGof (kJ/mol)

So (J/K·mol)

CO(g)

-110.5

-137.3

197.9

CO2(g)

-393.5

-394.4

213.6

O2(g)

0

0

205.0

O3(g)

142.2

163.4

237.6

H2O(l)

-285.8

-237.2

69.9

Na2CO3(s)

-1130.9

-1047.67

135.98

NaHCO3(s)

-947.68

-851.86

102.09

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