Environmental Protection Agency (EPA) MVAC Certification

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Get ready for the EPA MVAC Certification exam with our study materials covering flashcards and multiple choice questions, each offering hints and explanations. Prepare thoroughly for your certification!

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Is ozone a stable or unstable molecule?

Stable
Unstable
Reactive but stable
It varies with conditions

The correct answer is: Unstable

Ozone is an unstable molecule characterized by its three oxygen atoms (O3). This instability arises due to the nature of the bonds within the molecule. Ozone has a tendency to break down into oxygen (O2) under certain conditions, which is influenced by factors such as temperature and the presence of other chemicals. This property makes ozone a powerful oxidizing agent, leading it to react readily with various substances. While ozone's reactivity is a significant factor, it is essential to note that it does not vary with conditions in the same way that the stability would suggest. Instead, ozone consistently exhibits this instability, resulting in its classification as an unstable molecule. Understanding ozone's properties is crucial in fields like environmental science and air quality management, particularly since it plays a complex role in the atmosphere, both as a protective layer in the stratosphere and as a pollutant at ground level.