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Because the temperature change of the specific heat of water is small, the temperature rises almost linearly in proportion to the heating amount. However, when the temperature is changed to the saturation temperature (100 ° C.), evaporation starts while maintaining the same state, and the state where water and steam exist at the same time for a while. This condition is called wet steam. The mass of steam contained in 1 kg of wet steam is defined as dryness fraction, and that is usually represented by x. Further heating will turn all the water into steam state. This condition is called dry saturated vapor. The dry saturated steam is heated again when it is heated. This state is called heating steam. The temperature difference with the saturation temperature is called the degree of superheat. The higher the temperature the closer the nature of the vapor is to that of a perfect gas.
文頭にBecauseを置いたら減点されるよ。文章的なスタイルが良くないから。