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0.5 kg of a certain gas at 20C is heated reversibly to 650C according to a linear relationship between T and s, with gradient equal

0.5 kg of a certain gas at 20C is heated reversibly to 650C according to a linear relationship between T and s, with gradient equal to 500 K/(kJ/kg-K). Calculate the heat flow to the gas as well as the change in entropy. [Answers: 383 kJ; 1.26 kJ/kg-K]

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