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1 answer:
Answer : The correct option is, (B) Oxygen diffuses through the anode.
Explanation :
Hydrogen-oxygen fuel cell : As we know that the a fuel cell is a type of device that converts the chemical energy into electrical energy. In the hydrogen-oxygen fuel cell, the proton exchange membrane cell uses hydrogen and oxygen gas as a fuel.
In this cell reaction, hydrogen and oxygen gas are the reactants and water, electricity and heat are the products.
The half-cell electrode reaction are:
At anode :
At cathode :
That means the hydrogen undergoes reduction at anode and oxygen undergoes oxidation at cathode.
As per question, we can say that oxygen diffuses towards anode and hydrogen diffuses towards cathode.
Hence, the correct option is, (B) Oxygen diffuses through the anode.
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Answer:
1: At temperatures below 542.55 K
2: At temperatures above 660 K
Explanation:
Hello there!
In this case, according to the thermodynamic definition of the Gibbs free energy, it is possible to write the following expression:
Whereas ΔG=0 for the spontaneous transition. In such a way, we proceed as follows:
1:
It means that at temperatures lower than 542.55 K the reaction will be spontaneous.
2:
It means that at temperatures higher than 660 K the reaction will be spontaneous.
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