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Explain giving reason. NF3 is an exothermic compound but NCl3 is an endothermic compound.

Explain giving reason. NF3 is an exothermic compound but NCl3 is an endothermic
compound.

Grade:upto college level

3 Answers

Gaurav
askIITians Faculty 164 Points
9 years ago
Hello Student
NCl3 is endothermic compound because of its high enthalpy of formation due to large difference in sizes of N and Cl atoms. This large difference makes N-Cl bond weak, while in NF3 the sizes of atoms are not so different, therefore N-F bond is strong and thus it is an exothermic compound.
Pushpendra pal
11 Points
6 years ago
NF3 is exothermic due to negligible and strong N F bonds while In NCl3 nitrogen can`t accommodate big sized cl atoms . so its endothermic
Rishi Sharma
askIITians Faculty 646 Points
3 years ago
Dear Student,
Please find below the solution to your problem.

NCl3 is endothermic compound because of its high enthalpy of formation due to large difference in sizes of N and Cl atoms.
This large difference makes N-Cl bond weak, while in NF3 the sizes of atoms are not so different, therefore N-F bond is strong and thus it is an exothermic compound.

Thanks and Regards

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