What is the melting point and boiling point of ammonia gas?

Answer 1

Good question. At sea level pressure (14.7psia), ammonia boils at -28degrees F or approximately -33degreesC. Under considerably greater pressure, it is a liquid even at room temperature. Because it can be readily compressed into a liquid at room temperature and well beyond, it becameTHE refrigerant of choice in the early days of mechanical refrigeration and air-conditioning. However, its toxic nature made it dangerous/unsuitable to use in home refrigeration, and absolutely unsuitable for use in car air conditioning. When DuPont invented dichlorodifluoromethane, or "Freon12" in the 1940s, with a P-T liquification curve similar to that of ammonia, ammonia was quickly displaced in many/most applications in favor of "Freon12" and car air conditioning came into being. However, even to this day ammonia is still used as a refrigerant in some industrial applications, such as ice houses, due to its cheap price, and it poses no threat to the overall environment.

Answer 2

There isn't one. The ammonia becomes less soluble in water as the temperature raises until eventually it all comes out of solution, but that's not a "boiling point" in the normal sense of the word. The boiling point of an aqueous solution of ammonia is basically the boiling point of the water modified by its colligative properties (as it would be for any other solute).

Answer 3

The boiling point of ammonia is −33.34 °C (which is 240 K or -28 °F).

Answer 4

Ammonia (NH3)

Melting points: −77.73 °C, 195 K, -108 °F

Boiling points: −33.34 °C, 240 K, -28 °F

Answer 5

Melting point

−77.73 °C, 195 K, -108 °FBoiling point

−33.34 °C, 240 K, -28 °F

Answer 6

−77.73 °C (195.42 K)

Answer 7

640F or 338C

Answer 8

−77.73 °C (195.42 K)