First Law for Control Volume (Steady Flow Energy Equation)
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The steady flow energy equation is derived from:
Explanation: The equation is an application of the First Law (energy conservation) for open systems with steady flow
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If Q˙​=0 and W˙=0 in a steady flow process, inlet and outlet:
Explanation: Without heat or work, inlet energy (enthalpy + kinetic + potential) equals outlet energy.
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The term gz in the steady flow energy equation represents:
Explanation: gz is specific potential energy, accounting for elevation (z) in the energy balance
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 For a turbine, the steady flow equation typically shows
Explanation: Turbines convert inlet enthalpy to work, reducing outlet enthalpy, per the steady flow equation
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The steady flow energy equation balances:
Explanation: The equation ensures energy entering (enthalpy, kinetic, potential, heat) equals energy leaving (plus work).
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In a nozzle, if heat transfer is negligible (Q˙​=0) and no work is done (W˙=0), what increases?
Explanation: In a nozzle, enthalpy decreases to increase kinetic energy (velocity), per the steady flow energy equation.
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 Which energy term is included in the steady flow energy equation?
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For a steady flow process, the mass flow rate is:
Explanation: Steady flow means the mass flow rate (mË™\dot{m}mË™) is constant, with no accumulation in the control volume.
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 In the steady flow energy equation, h represents:
Explanation: h is specific enthalpy (internal energy + flow work), a key term in the steady flow energy equation.
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The steady flow energy equation applies to:
Explanation: The steady flow energy equation is used for control volumes (open systems) where mass flows in and out, like turbines.
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