Decrease in temperature indicate about the molecules in a sample of liquid water?

When the temperature of liquid water is decreased, the thermal energy possessed by the molecules decreases. This leads to decrease in kinetic energy, so the molecules come closer to each other and the intermolecular hydrogen bonding becomes significant. Upon further decrease of the temperature to a point below the freeing point, liquid water would solidify forming ice.

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 .

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