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Textbook Expert
Textbook ExpertVerified Tutor
24 Nov 2021

Given information

The relation between , and

 

Where,

  • is standard energy change of formation.

  • is the standard entropy change of formation.

  • is the standard enthalpy change of formation

 

Step-by-step explanation

Step 1.

Fluorine is the smallest halide among all the halogens and it is most electronegative. So, it will form the most stable hydrogen halide. Hence, its  value is most negative.

The heat of formation will become increasingly positive on moving down the halogen group because the bond length increases.

 

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