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Air enters a compressor operating at steady state at 1 atm. with a specific enthalpy of 290 kJ/kg and exits at a higher pressure with a specific enthalpy of 1023 kJ/kg. The mass flow rate is 0.1 kg/s. If the compressor power input is 77 kW. Neglect flow kinetic and potential energy effects. What is the compressor rate of internal irreversibility (kJ/kg-K) and its isentropic efficiency? Be careful and look up the meaning of isentropic efficiency (emphasis on "isentropic").
A hot upsetting of stainless steel 316/316L, 2000mm dia disc, 200mm thickness is upset at 1200 degree Celsius to 150mm thickness. what will be the Upsetting force required to forge this disc and what will be the yield stress at this temperature.
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What is the enthalpy of this reaction? Assume that no heat is lost to the surroundings or to the coffee cup itself.
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