In a vertical cylinder closed at both ends there is a massive piston, on both sides of which there is one mole of air at the same temperature. The ratio of pressure in the lower part of the vessel to the pressure in the upper part is n=3.0. Equal amounts of gas were added to both parts and the pressure ratio became k=2.0. How much did you increase the amount of gas in the cylinder? The friction of the piston against the walls is negligible.
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