Gas Phase Ion Chemistry vs. Plasma Chemistry

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Gas Phase Ion Chemistry and Plasma Chemistry are related fields, but they focus on different aspects of ionization and dissociation processes. Plasma chemistry specifically involves ionization that occurs at high temperatures, leading to a state where a significant portion of the gas is ionized. In contrast, gas phase ion chemistry can occur at lower temperatures and includes ionization processes that may not require high energy, such as exposure to radiation. While both fields study ionization, plasma chemistry emphasizes the unique properties and behaviors of ionized gases, which differ from those of neutral gases. For those interested in the ionization and dissociation of hydrogen gas, both fields offer valuable insights, but plasma chemistry is particularly relevant due to its focus on ionization phenomena. Understanding concepts like the Saha equation can provide further context on ionization equilibrium in plasmas.
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What is the difference between "Gas Phase Ion Chemistry" and "Plasma Chemistry"? If one wants to learn about the ionization and dissociation processes of hydrogen gas are either of theses fields appropriate to study?
 
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I think that, by its definition, the plasma phase implies some degree of ionization.
Therefore the temperature must be high enough to reach a sufficient ionization level.
Ionization and dissociation are therefore more important in a plasma than in a "normal" gas.
However, even at "ambient" temperature, there is some ionization.
In addition, ionization can be obtained by other means that high temperatures: like by exposition to radiations (UV for example).
You will find a lot of data about ionization equilibrium in plasma physics.
See for example the Saha equation:

http://en.wikipedia.org/wiki/Saha_ionization_equation
 
I've read that "Plasmas are gas phase systems". So are "Gas Phase Ion Chemistry" and "Plasma Chemistry" different names for the same field? Is this an appropriate field to study in order to learn about the dissociative ionization of hydrogen gas?
 
Please read Wikipedia about the definition of a plasma:

http://en.wikipedia.org/wiki/Plasma_(physics )

Of course we can find common aspects between a gas and a plasma.
But ionization is specific to the plasma state.
Ionization has many observable consequence that makes a plasma different from a gas.
 
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