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A sample consisting of 22.7 g of a nongaseous, unstable compound X is placed inside a metal cylinder with a radius of 8.00 cm, and a piston is carefully placed on the surface of eth compound so that for all practical purposes, the distance between the bottom of the cylinder and the piston is zero. (A hole in the piston allows trapped air to escape as the piston is placed on the compound; then this hole is plugged so that nothing inside the cylinder can escape, a diagram would help you here). The piston and the cylinder apparatus is carefully placed in 10.00 kg of water at 25.00oC. The barometric pressure is 778 torr.

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