Air enters a rectangular duct at (T_{1}=285 mathrm{~K}, P_{1}=) (390 mathrm{kPa}), and (mathrm{Ma}_{1}=2). Heat is transferred to

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Air enters a rectangular duct at \(T_{1}=285 \mathrm{~K}, P_{1}=\) \(390 \mathrm{kPa}\), and \(\mathrm{Ma}_{1}=2\). Heat is transferred to the air in the amount of \(55 \mathrm{~kJ} / \mathrm{kg}\) as it flows through the duct. Disregarding frictional losses, determine the temperature and Mach number at the duct exit. 

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FIGURE 12-85

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