Задача id9765

A cylindrical vessel with double walls is filled with ice. The radius of the outer wall is r2=5 cm, the inner one is r1=4 cm, the height of the vessel is H = 20 cm. The air pressure between the walls before the vessel is filled with ice is p = 1.3 • 10-2 Pa. Ambient air temperature T2=293 K. Determine the time during which m = 100 g of ice will melt in the vessel.

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