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A sphere 28 cm in diameter contains an ideal gas at 1.4 at m and 9?C. As the sphere is heated to 150 ? C, gas is allowed to escape. The valve is closed and the sphere is placed in an ice-water bath.

1. What is the pressure in the sphere when it is in the ice water? Answer in units of Pa.

2. How many moles of gas escape from the sphere as it warms? Answer in units of mol.

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