The equation: Q + L, = PEDV, + m2 (h + Ec.g.0), - th (h+ Ecg.0), 262 26275 26275 (a) Represents the First Law of Thermodynamics in its general formulation for closed systems (b) Represents the First Law of Thermodynamics for 1-D open systems, whose validity is restricted to steady- state flows L751 O (C) Represents the First Law of Thermodynamics for closed systems, whose validity is restricted to steady- state flows O (d) Represents the First Law of Thermodynamics in its general formulation for 1-D open systems

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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The equation:
202
pEdV, + m2(h + Eco.w), – m (h+Ecga),
at
Vc
(a) Represents the First Law of Thermodynamics in its general formulation for closed systems
(b) Represents the First Law of Thermodynamics for 1-D open systems, whose validity is restricted to steady-
state flows
O (C) Represents the First Law of Thermodynamics for closed systems, whose validity is restricted to steady-
state flows
(d) Represents the First Law of Thermodynamics in its general formulation for 1-D open systems
Transcribed Image Text:The equation: 202 pEdV, + m2(h + Eco.w), – m (h+Ecga), at Vc (a) Represents the First Law of Thermodynamics in its general formulation for closed systems (b) Represents the First Law of Thermodynamics for 1-D open systems, whose validity is restricted to steady- state flows O (C) Represents the First Law of Thermodynamics for closed systems, whose validity is restricted to steady- state flows (d) Represents the First Law of Thermodynamics in its general formulation for 1-D open systems
Consider a 1-D, steady-state, isothermal flow from state 1 to state 2, in which the following quantities are given:
LF0, L-30 kJ/kg. T=300 K, p,=1 bar.
The fluid is air (R=287 J/kgK, k=1.4) and the change in kinetic energy between 1 and 2 is negligible.
How much is the pressure P2?
O (a) 0.652 bar
(b) 0.706 bar
OC) 0.692 bar
2 d) None of the others
Transcribed Image Text:Consider a 1-D, steady-state, isothermal flow from state 1 to state 2, in which the following quantities are given: LF0, L-30 kJ/kg. T=300 K, p,=1 bar. The fluid is air (R=287 J/kgK, k=1.4) and the change in kinetic energy between 1 and 2 is negligible. How much is the pressure P2? O (a) 0.652 bar (b) 0.706 bar OC) 0.692 bar 2 d) None of the others
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