Air enters a rectangular duct at T1 = 300 K, P1 = 420 kPa, and Ma1 = 2. Heat is transferred to the air in the amount of 55 kJ/kg as it flows through the duct. Disregarding frictional losses, determine the temperature and Mach number at the duct exit.

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55 kJ/kg p,-420 kPa Ti 300 KAin Ma 2 FIGURE P17-111