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A living plant leaf is an open system that exchanges energy (sunlight and thermal flows) + matter (O2, CO2, water vapor, etc.) with the surroundings (the exterior). Even with irreversible processes (energy dissipation) we find that the net entropy change for the system + surroundings can decrease; i.e. dS < 0. Using equations presented in lecture and your own critical thinking: a) explain how this is possible in terms of deS and diS. b) Explain how the Second Law remains valid for this case.
a carnot heat pump cycle is executed in a steady-flow system with r-134a flowing at a rate of 0.216 kgs. the net power
Argon at 20oC and 100kPa has a velocity of 27 m/s and enters a constant diameter pipe of 18mm. As the argon passes through the pipe, it is heated in a steady flow process to 100oC. The pressure at that point is 28 kPa. Calculate the velocity at the p..
air at 30 celcius and 2 mpa flows at steady state in a horizontal pipeline with a velocity of 25ms . it passes through
in moving from point b in a particular circuit to point a an electron gains 4 aj of potential energy. what is the
a cold storage room has walls made of 0.23 m of brick on the outside 0.08 m of plastic foam and finally 1.5 cm of wood
a boat of length 50 m is designed to cruise at 30 mph and is to be tested in a tow tank with a model of length 0.5 m.
water enters the steam generator of the power plant shown in the figure at 7mpa 50 degrees c and exits at 7mpa 600
Design of absorption column and the cooler. Process design of other units should be completed along with pipe sizes.
consider a building whose annual air conditioning load is estimated to be 120000 kwh in an area where the unit cost of
during actual expansion and compression processes of gases pressure and volume are often related by pvn c where n and
A micro channel 10 µm tall, 50 µm wide, and 2 cm long is used for analysis of bradykinin, a small peptide with a molecular weight of 1.06 kDa (1 Da = 1 g/mol). What is the morality of the bradykinin sample (i.e. convert µg/mL to M)?
a 50kg uniform box is held on an inclined surface by a horizontal rope which passes around a pulley. the coefficient of
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