What is the sign of the enthalpy term in an ionization reaction?

Answer 1

Given the current conventions, they should be POSITIVE........

Think about the reaction of ionization.

#"Atom(g)"##rarr##"Atom(g)"^+ + e^(-)#

It makes sense that energy would be needed to separate an electron from a positively charged nucleus, and we could modify the reaction to account for this, i.e.

#"Atom(g)"+Deltararr"Atom(g)"^(+) + e^(-)#
So given that this is an endothermic reaction, #Delta# should be POSITIVE........
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Answer 2

The enthalpy term in an ionization reaction is typically positive.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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