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A rigid vessel contains 7 kg of an ideal gas at 5 atm.A valve is opened, and half of the mass of the gas escapes.If the final pressure in the tank is 1.5 atm and the final temperature in the tank is -91°C, what is the initial temperature of the gas?

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A rigid vessel contains 7 kg of an ideal gas at 5 atm.A valve is opened, and half of the mass of the gas escapes.If the final pressure in the tank is 1.5 atm and the final temperature in the tank is -91°C, what is the initial temperature of the gas?





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