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Select the correct order for the propert...

Select the correct order for the property given in brackets.

A

`F^(+)(g) lt Cl^(+)(g) : (EA "order")`

B

`F^(+)(g) lt Cl^(+)(g) : (|DeltaH_(eg)| "order")`

C

`O(g) lt S(g) : (|DeltaH_(eg)| "order")`

D

`S2^(-)(g) lt Cl^(-)(g), (IE "order")`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the correct order for the properties given, we will analyze the electron affinity and ionization energy of the specified ions. We will follow these steps: ### Step 1: Understand Electron Affinity Electron affinity is defined as the amount of energy released when an electron is added to a neutral atom. A higher electron affinity indicates a stronger attraction for the added electron. ### Step 2: Compare F⁺ and Cl⁺ - **Fluorine (F)** is more electronegative than **Chlorine (Cl)**. - When comparing F⁺ and Cl⁺, F⁺ will have a higher electron affinity because it has a stronger attraction for electrons due to its higher electronegativity. - Therefore, the order of electron affinity for F⁺ and Cl⁺ is: **F⁺ > Cl⁺**. ### Step 3: Compare O and S for Electron Gain Enthalpy - **Oxygen (O)** is smaller in size compared to **Sulfur (S)**, which means that the added electron in oxygen will experience more repulsion due to the smaller atomic radius. - Sulfur, being larger, will have less electron-electron repulsion when gaining an electron. - Therefore, the order of electron gain enthalpy for O and S is: **S > O**. ### Step 4: Understand Ionization Energy Ionization energy is the energy required to remove the outermost electron from an atom or ion. A higher ionization energy indicates that it is more difficult to remove an electron. ### Step 5: Compare S²⁻ and Cl⁻ - **S²⁻** (sulfide ion) has gained two electrons, while **Cl⁻** (chloride ion) has gained one electron. - The size of Cl⁻ is smaller than that of S²⁻, which means that removing an electron from Cl⁻ will require more energy due to its smaller size and greater effective nuclear charge. - Therefore, the order of ionization energy for S²⁻ and Cl⁻ is: **Cl⁻ > S²⁻**. ### Step 6: Summarize the Correct Orders - For electron affinity: **F⁺ > Cl⁺** - For electron gain enthalpy: **S > O** - For ionization energy: **Cl⁻ > S²⁻** ### Final Answer The correct orders for the properties given in the question are: 1. Electron affinity: **F⁺ > Cl⁺** 2. Electron gain enthalpy: **S > O** 3. Ionization energy: **Cl⁻ > S²⁻**
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