Calculate δg∘rxn for the following reaction: 4co(g)+2no2(g)→4co2(g)+n2(g).use the following reactions and given δg∘rxn values: a) 2no(g)+o2(g)→2no2(g), δg∘rxn= - 72.6 kjb) 2co(g)+o2(g)→2co2(g), δg∘rxn= - 514.4 kjc) 12o2(g)+12n2(g)→no(g), δg∘rxn= 87.6 kj

Answer : The   value of for the reaction is -1131.4 kJ

Explanation :

According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.

The given main reaction is,

The intermediate balanced chemical reaction will be,

(1)    

(2)    

(3)    

Now we will reverse the reaction 1, multiply the reaction 2 by 2, reverse and half the reaction 3 and then adding all the equations, we get :

(1)    

(2)    

(3)    

The expression for will be,

Therefore, the value of for the reaction is -1131.4 kJ

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