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Why is ammonia a gas at room temperature?


mahiraman
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I’m doing an assignment for my thermodynamics class regarding the condensation of ammonia. I’ve been doing some research regarding why it’s a gas at STP and I’m having some difficulty understanding. As I understand, the intermolecular forces are usually sufficient in explaining the phase of a compound at STP. But NH3 displays hydrogen bonding, the strongest IMF. I read in a journal that the low density of this compound explains it being a gas, but I’m wondering if I’m missing something. This seems trivial, but I don’t understand why the strong hydrogen bonding doesn’t seem to play a role in its standard state. Any help is appreciated!

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Water has 2 lone pairs with an extremely electronegative oxygen creating a much stronger hydrogen bonding network than that of ammonia, with only one lone pair and a relatively weak electronegativity WRT the Nitrogen.

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  • 2 weeks later...
On 4/15/2022 at 12:13 PM, mahiraman said:

I’m doing an assignment for my thermodynamics class regarding the condensation of ammonia. I’ve been doing some research regarding why it’s a gas at STP and I’m having some difficulty understanding. As I understand, the intermolecular forces are usually sufficient in explaining the phase of a compound at STP. But NH3 displays hydrogen bonding https://100001.onl/ https://1921681254.mx/, the strongest IMF. I read in a journal that the low density of this compound explains it being a gas, but I’m wondering if I’m missing something. This seems trivial, but I don’t understand why the strong hydrogen bonding doesn’t seem to play a role in its standard state. Any help is appreciated!

I got this,...

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