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Are Enthalpy Reactions Reversible?

Chloe Bennett • • 7 min read
Are Enthalpy Reactions Reversible?

Yes, in a reverse reaction the sign changes. That is because Enthalpy is a state function

state function
In thermodynamics, a state variable is an independent variable of a state function like internal energy, enthalpy, and entropy. Examples include temperature, pressure, and volume. Heat and work are not state functions, but process functions.
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, one that depends on only the current state of the function. That means the energy required to push a reaction to its products would be directly reversed to push it back to its reactants.

Is enthalpy reversible?

Therefore, the change in enthalpy is positive, and heat is absorbed from the surroundings by the reaction. Whether a reaction is endothermic or exothermic depends on the direction that it is going; some reactions are reversible, and when you revert the products back to reactants, the change in enthalpy is opposite.

What is the enthalpy for its reverse reaction?

The reverse reaction has the negative enthalpy of the forward one.

Chloe Bennett
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Chloe Bennett

Chloe Bennett explores the intersection of pop culture, streaming entertainment, digital trends, and contemporary lifestyle. Her weekly commentary reaches thousands of culture enthusiasts.