Midterm 2 - Question 1 | General Chemistry 3

The combustion of carbon monoxide is represented by the following equation:

CO (g) + ½ O2 (g) → CO2 (g)


1) Determine the standard enthalpy change ΔH0rxn for the combustion of CO at 298 K

2) Determine the standard entropy change ΔS0rxn for this reaction at 298 K

3) Is the reaction spontaneous under standard conditions at 298 K? Justify.

4) Calculate the value of the equilibrium constant Keq at 298 K

 

Data: At 298 K:

C (s) + ½ O2 (g) → CO (g)     [ΔH0 = - 110.5 kJ.mol-1]

C (s) + O2 (g) → CO2 (g)     [ΔH0 = - 393.5 kJ.mol-1]

S0 [CO (g)] = 197.7 J.mol-1.K-1

S0 [CO2 (g)] = 213.7 J.mol-1.K-1

S0 [O2 (g)] = 205.1 J.mol-1.K-1