How long does it take a ice cube to melt in a cup of room temperature salt water

Explanation:

A 1 inch ice cube, submerged in a cup of cold water would take about 15-20 minutes to melt. In a room temperature water, it would melt in 5-10 minutes

The difference between the air temperature and the freezing point of salt water is bigger than the difference between the air temperature and the freezing point of freshwater. This makes the ice with salt on it melt faster. Try putting ice in a glass of cold water. Leave it there for 10 minutes or so.

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .