Problem: Calculate ΔS∘rxn for the reaction 2NO(g)+O2(g)→2NO2(g)SubstanceS∘ (J/mol⋅K)NO2240.0O2205.2NO210.8

FREE Expert Solution

We can use the following equation to solve for ΔS˚rxn:

S°rxn = S°prod-S°react 

Note that we need to multiply each S˚ by the stoichiometric coefficient since S˚ is in J/mol • K. 


The given balanced equation for the reaction is 2 NO(g)+O2(g)2 NO2(g)


Given: 

S° NO2(g) = 240.0 J/(K•mol)

S° O2(g) = 205.2 J/(K•mol)

S° NO(l) = 210.8 J/(K•mol)


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Problem Details

Calculate ΔS∘rxn for the reaction 2NO(g)+O2(g)→2NO2(g)


SubstanceS∘ (J/mol⋅K)
NO2240.0
O2205.2
NO210.8

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