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The boiling point of NH 3 is higher than that of PH 3 . The nitrogen atom is more electronegative (3.0) than phosphorus (2.1). As a result, NH 3 exhibits intermolecular hydrogen bonding while PH 3 does not show any hydrogen bonding. Thus, extra energy is needed to break these hydrogen bonds in Nh 3 . Thus, NH 3 has higher boiling point than PH 3 .

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Chemical Bonding and Molecular Structure

Short Answer Type

241.

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Long Answer Type

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Short Answer Type

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245.

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246.
Out of NH₃ and PH₃, which has higher boiling point and why?

The boiling point of NH₃ is higher than that of PH₃. The nitrogen atom is more electronegative (3.0) than phosphorus (2.1). As a result, NH₃ exhibits intermolecular hydrogen bonding while PH₃ does not show any hydrogen bonding. Thus, extra energy is needed to break these hydrogen bonds in Nh₃. Thus, NH₃ has higher boiling point than PH₃.

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