Ainda sobre a combustao completa do metanol que pode ser representada pela equação nao-balanceada abaixo. Quando se utilizam 8,0
mols de metanol nessa reação, qual é a quantidade de materia (mol) de agua produzida (em mols)?
(olhe a imagem por favor)
(olhe a imagem por favor)
1 answer:
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Answer:
Only gives spontaneous reaction.
Explanation:
A redox reaction will be spontaneous if standard reduction potential () of the reaction is positive. Because it leads to negative standard gibbs free energy change (
), which is a thermodynamic condition for spontaneity of a reaction.
Where and
represents standard reduction potential of reduction half cell and standard reduction potential of oxidation half cell.
(1) Oxidation: ;
Reduction: ;
So,
Hence this pair will give spontaneous reaction.
(2) Similarly as above,
Hence this pair will give non-spontaneous reaction.
(3) Similarly as above,
Hence this pair will give non-spontaneous reaction.
(4) Similarly as above,
Hence this pair will give non-spontaneous reaction.