What is the polytropic exponent of this process

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Air, initially at 220 kPa and 450 K undergoes a polytropic state change to 374 kPa and 495 K. What is the polytropic exponent of this process?

And

Saturated water vapor is contained in a rigid container. Heat is then added until the pressure and temperature become 861.818 MPa and 400 ?C, respectively. What was the initial temperature of the steam?

Reference no: EM13710399

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