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Problem 5.10: Propane is isothermally compressed from 0.01 bar, -51.4 °C to 17 bar. The process takes place reversibly in a closed system. a) Draw the PV graph of the process. b) Calculate the entropy change of propane. c) How much heat is exchanged between the system and its surroundings? Is this heat added to or removed from the system? Additional data: Use the Lee-Kesler graphs for enthalpy and entropy. The saturation pressure of propane at -51.4 °C is 0.66 bar.
Take the ideal-gas CP of propane at these conditions to be constant and equal to 67 J/mole K.
If the face opening for a laboratory hood installation is to be 2 feet high and 5 feet wide, what volumetric flow rate is required to generate a face velocity of 100 ft/min?
A flat slab of Douglas fir wood 50.8 mm thick containing 30 wt% moisture is being dried from both sides (neglecting edges and ends). The equilibrium moisture content at the surface of the wood due to the drying air blown over it is held at 5 wt% mois..
For the electromagnet shown in Figure P12.4.3, the λ-i relationship for the normal working range is given by i = aλ2 + bλ(x - d)2, where a and b are constants. Determine the force applied to the plunger by the electric system.
The following four solvents, with accompanying distribution coefficients in mass-fraction units, are being considered. Water and each solvent (C) can be considered immiscible. For each solvent, estimate the kilograms required per hour if a single ..
Consider a series-carry synchronous counter with T flip-flops shown in Figure P6.2.29 in which the AND gates carry forward the transitions of the flip-flops, thereby improving the speed. Sketch the output waveform for the synchronous counter.
Evaluate two to four (2-4) weaknesses that are evident in Honda's product life cycle. Generate a new product design and product selection, and then determine three (3) strategies that the organization needs in order to strengthen the operation. Pr..
In the reaction 2C8H18 + 25O2 --> 16CO2 + 18 H2O, the ratio of volumes of O2 to CO2 is ?
A four-pole, lap-wound armature has 144 slots with two coil sides per slot, each coil having two turns. If the flux per pole is 20 mWb and the armature rotates at 720 r/min, calculate the induced voltage, given that the number of parallel paths is..
Mass transfer coefficient from a free water surface to an adjacent moving air stream has been found to be 0.015 kg/m2-s. Estimate the rate of evaporation from a surface of 1 m2 at a temperature of 28 oc into an air..
Technical specialists at the company have flagged part of an internal calculation by a junior engineer as potentially erroneous. The excerpt is given below. Please prepare a brief memo for our Quality Assurance department describing the errors and pr..
explain how a supercritical flow changes to a subcritical flow. You may need to refer text books and web pages to answer this question.
A synchronous generator has a rotor with six poles and operates at 60 Hz.
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