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Along the period, atomic/ionic radius an...

Along the period, atomic/ionic radius and metallic character generally decreases, while IE, EN and nonmetallic character and oxidizing power increases.
  If the value of electron gain enthalpy `(Delta_H_(eg))` of 4 elements are given below, then the element which may behave as strongest oxidizing agent is
`{:("Element",DeltaH_(eg)),(P,"-153 kJ/mole"),(Q,"-90 kJ/mole"),(R,"86 kJ/mole"),(S,"-209 kJ/mole"):}`

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Q

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P

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S

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R

Text Solution

AI Generated Solution

The correct Answer is:
To determine which element behaves as the strongest oxidizing agent based on the given electron gain enthalpy values, we can follow these steps: ### Step 1: Understand the Concept of Oxidizing Agents An oxidizing agent is a substance that gains electrons in a chemical reaction and is reduced. The stronger the oxidizing agent, the more negative its electron gain enthalpy (ΔH_(eg)) value will be. This means it has a greater tendency to gain electrons. ### Step 2: Analyze the Given Data We have the following electron gain enthalpy values for the elements: - Element P: ΔH_(eg) = -153 kJ/mole - Element Q: ΔH_(eg) = -90 kJ/mole - Element R: ΔH_(eg) = 86 kJ/mole (positive value indicates it does not favor gaining electrons) - Element S: ΔH_(eg) = -209 kJ/mole ### Step 3: Identify the Most Negative ΔH_(eg) To find the strongest oxidizing agent, we need to identify which element has the most negative ΔH_(eg) value: - For Element P: -153 kJ/mole - For Element Q: -90 kJ/mole - For Element R: 86 kJ/mole (not an oxidizing agent) - For Element S: -209 kJ/mole ### Step 4: Compare the Values Among the given values, Element S has the most negative ΔH_(eg) value of -209 kJ/mole. This indicates that Element S has the highest tendency to gain electrons and thus behaves as the strongest oxidizing agent. ### Conclusion The element that behaves as the strongest oxidizing agent is **Element S**. ---
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