The substance ammonia has the following properties: normal melting point: 195.4

Question

The substance ammonia has the following properties: normal melting point: 195.4 K normal boiling point: 239.8 K triple point: 5.9×10-2 atm, 195.3 K critical point: 111.5 atm, 405.5 K At temperatures above 405.5 K and pressures above 111.5 atm, NH3 is a _________solidliquidgassupercritical fluid. NH3 does not exist as a liquid at pressures below atm. NH3 is a _________solidliquidgassupercritical fluid at 56.8 atm and 180.8 K. NH3 is a _________solidliquidgassupercritical fluid at 5.90×10-2 atm and 254.3 K. NH3 is a _________solidliquidgassupercritical fluid at 1.00 atm and 233.0 K.

Explanation / Answer

1. Super critical fluid : Given that both temperature and pressure are surpassed, considering the critical point of the substance, it can be assumed it is this kind of fluid under such circumstances.

2. Solid: A higher pressure makes the molecules of the substance be less fluid. Also, the temperature is quite low when analyzing the normal melting and boiling points.

3. Gas: Temperature is over the normal boiling point and the pressure is quite low, which allows the molecules to behave more fluently.

4. Liquid: The pressure is normal (atmospheric) and the temperature lies between the melting and the boiling points, so the substance is liquid.

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