Respuesta :
Answer: [tex]2C_2H_6(g)+7O_2(g)\rightarrow 4CO_2(g)+6H_2O(g)[/tex]
[tex]NH_4I(s)\rightarrow NH_3(g)+HI(g)[/tex]
[tex]2H_2O(g)+2SO_2(g)\rightarrow 2H_2S(g)+3O_2(g)[/tex]
Explanation:
Entropy is the measure of randomness or disorder of a system.
A system has positive value of entropy if the disorder increases and a system has negative value of entropy if the disorder decreases.
1. [tex]N_2(g)+3H_2(g)\rightarrow 2NH_3(g)[/tex]
As 4 moles of gaseous reactants are changing to 2 moles of gaseous products, the randomness is decreasing and the entropy is negative
2. [tex]2C_2H_6(g)+7O_2(g)\rightarrow 4CO_2(g)+6H_2O(g)[/tex]
As 9 moles of gaseous reactants are changing to 10 moles of gaseous products, the randomness is increasing and the entropy is positive.
3. [tex]NH_4I(s)\rightarrow NH_3(g)+HI(g)[/tex]
As 1 mole of solid reactants is changing to 2 moles of gaseous products, the randomness is increasing and the entropy is positive.
4. [tex]2H_2O(g)+2SO_2(g)\rightarrow 2H_2S(g)+3O_2(g)[/tex]
As 4 moles of gaseous reactants is changing to 5 moles of gaseous products, the randomness is increasing and the entropy is positive
5. [tex]2NO(g)+2H_2(g)\rightarrow N_2(g)+2H_2O(l)[/tex]
As 4 moles of gaseous reactants is changing to 1 moles of gaseous products, the randomness is decreasing and the entropy is negative.
