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Calculate the heat capacity of a gas sample from the following information : The sample comes to equilibrium in a flask at 298.15 K and 121.3 kPa. A stopcock is opened briefly, allowing pressure to drop to 101.3 kPa. With the stopcock closed, the flask warms, returning to 298.15 K, and the pressure is measured as 104.0 kPa. Determine Cp in J/mol K assuming the gas to be ideal and the expansion of the gas remaning in the flask to be reversible and adiabatic.

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