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Cooling down a liquid slows the ,until they are in a fixed position and are all close together . The particles are arranged like in a , and the substance is frozen .

In order for a high temperature boiler or steam engine to produce superheated water, or steam: the heat source must be greater than 100°c the water must be permitted to evaporate quickly the system must be sealed and become pressurized above atmospheric pressure the vapor pressure must be kept below 760 mm(hg)