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t #7 An automotive air-conditioning system based on R-134a operates between 250 psia and 40 psia A pressure-enthalpy diagram for R-134a is shown on
t #7 An automotive air-conditioning system based on R-134a operates between 250 psia and 40 psia A pressure-enthalpy diagram for R-134a is shown on the opposite page. If 250-psia saturated liquid R-134a is throttled to 40 psia, the change [Btu/(Ibm-R)] in entropy (Stal - Sinal) will be most nearly: O A. -0.07 O B 0.01 C. 0.11 O D. 0.15 20 40 09 80 100 10 120 140 091 10
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Modern Quantum Mechanics
Authors: J.J Sakurai
Revised Edition
9781108499996, 201539292, 978-0201539295
