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a piazzacom Your solutions to (10) and (11) should include PV diagrams. (10) [6 points] To discover whether an unknown gas is monatomic or diatomic,

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a piazzacom Your solutions to (10) and (11) should include PV diagrams. (10) [6 points] To discover whether an unknown gas is monatomic or diatomic, an experimenter takes a 2.0 L sample of the gas at STP and heats this sample to 100C at constant volume. (a) The gas absorbs 180] of heat-energy in this process. Is this gas monatomic or diatomic? (b) The experimenter weighs the sample and finds it has a mass of 2.5 g. What molecule or atom comprises the gas? (c) The experimenter then releases a piston and allows the gas to cool to room temperature 20C under constant pressure. How much work does the gas do (take care of the sign)? (11) [4 points] A piston of area 90 cm2 slowly compresses a gas which remains at constant pressure of 15 atmospheres. The final position of the piston is 12 cm from its initial position, and the internal energy of the gas drops by 15 J. (a) Find the amount of heat and the work done by the gas. (b) Is heat removed from or added to the gas in this process

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