Question

Some fuel cells are powered by hydrogen. Scientists are looking into the decomposition of water (H2O) to make hydrogen fuel with the help of the Sun’s energy. What challenge do scientists face with this task?
A.
Decomposing water requires a high activation energy.
B.
The Sun isn't a renewable resource.
C.
Decomposing water results in toxic byproducts.
D.
Scientists are uncertain what to do with the excess oxygen.

Answer 1

A.  Decomposing water requires a high activation energy.

Explanation:

In decomposing water to release hydrogen gas to make fuel cells, the process requires a very high activation energy.

                             2H₂O ⇆ 2H₂  + O₂

 This is the overall reaction. O-H must be broken to release free hydrogen to produce hydrogen gas.

The O-H bond is a very strong force of attraction that requires a high activation energy to overcome.

• The activation energy is the energy barrier that must be overcome before a reaction takes place.
• The sun is a renewable source of energy.
• Water decomposition produces useful oxygen gas needed by all life for cellular respiration.

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Source of energy brainly.com/question/2948717

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