In the power plant of a nuclear submarine, the temperature of the water in the reactor is above 100°C. How is this possible?
Solution 38E The nuclear submarine which is below the sea, the pressure of the surrounding is very high. This is trivial, the more deeper you go in the sea, the more pressure you feel. The increase in pressure also increases the boiling point of water. Because the boiling point of any liquid is defined as, when the atmospheric pressure and the vapour pressure created by the liquid are same, it starts boiling. 0 At standard temperature and pressure near sea level, water boils at 100 C . but when 0 pressure increases the water boils at a higher temperature than 100 C . Once it starts boiling, you cannot increase the temperature any more. But as the boiling point itself 0 increases, the water inside the nuclear submarine reactor can reach above 100 C . this does not violate the laws of thermodynamics. In short, the reason is more pressure inside the sea.