(a)
Interpretation:
The flow chart for the process should be determined.
Concept introduction:
Enthalpy of a system can be calculated as,
Where, m = mass, Cp = specific heat and
(b)
Interpretation:
The values of enthalpies for the given case should be calculated.
Concept introduction:
Enthalpy of a system can be calculated as,
Where, m = mass, Cp = specific heat and
(c)
Interpretation:
The required mass feed rate of the steam and the volumetric feed ratio of two streams should be calculated.
Concept introduction:
Enthalpy of a system can be calculated as,
Where, m = mass, Cp = specific heat and
(d)
Interpretation:
The heat transferred from water to propane should be calculated.
Concept introduction:
Enthalpy of a system can be calculated as,
Where, m = mass, Cp = specific heat and
(e)
Interpretation:
The changes in the outlet stream due to scaling should be explained.
Concept introduction:
Enthalpy of a system can be calculated as,
Where, m = mass, Cp = specific heat and
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Chapter 8 Solutions
EBK ELEMENTARY PRINCIPLES OF CHEMICAL P
- 4 3 1 L € Example: An equimolar liquid mixture of benzene (B) and toluene (T) at 10 °C and 1 atm is fed continuously to a vessel at 34 mm Hg the mixture is heated to 50 °C. The liquid product is 40 mole% B, and the vapor product is 68.4 mole% B. How much heat must be transferred to the mixture per g-mole of feed? Tes00+ SE (T)- srt 21.9 bns nivis ni shutmoqmet isothio bus trinq gnillod temos a (*) 910zang 100sy most beds zuziyani 19 tolg's agoarrow_forwardThe gas A(g) (1 mole) undergoes a two-step process one after another as described below :i) The gas is expanded at 25°C and from 1 bar pressure against a constant pressure of 0.2 bar and the final volume of the gas is the twice the initial volume.ii) The gas is cooled down to -25°C at constant volume.Cv,m = 3/2 RCalculate ΔU, ΔH, q and w for the each step and for the entire processarrow_forward1. During a reversible process there are abstracted 317 kJ/s from 1.134 kg/s of a certain gas while the temperature remains constant at 26.7°C. For this gas, c, = 2.323 and c, = 1.173 kJ/kg.K. The initial pressure is 568 kPA. For both nonflow and steady flow (AP=0, AK=0) process, determine (a) initial volume, final volume and final pressure, (b) the work and Q, (c)AS and AH.arrow_forward
- (5) The emissions from a manufacturing process contain gaseous pollutant that cause odors and fumes. The company plans to incinerate the 5,000 acfm exhaust stream. Estimate the volumetric (standard) flowrate of natural gas fuel required to increase the waste gas stream temperature from the initial 80°F to the required temperature of 2500°F. Energy (enthalpy) is transferred from the fuel to the gas. Neglect any possible heat losses in this process. The average net heating value of natural gas is 850 - 1050 Btu/std-ft. Include a diagram of the scenario.arrow_forwardA gaseous fuel containing methane and ethane is burned with excess air. The fuel enters the furnace at 25°C and 1 atm, and the air enters at 200°C and 1 atm. The stack gas leaves the furnace at 800°C and 1 atm and contains 5.32 mole% CO2, 1.60% CO, 7.32% O₂, 12.24% H₂O, and the balance ₂. 1. Calculate the molar percentages of methane and ethane in the fuel gas and the percentage excess air fed to the reactor. 2. Calculate the heat (kJ) transferred from the reactor per cubic meter of fuel gas fed. 3. A proposal has been made to lower the feed rate of air to the furnace. State advantages and a drawback of doing so.arrow_forwardCalculate the heat (q) and the work (w) in Joules, which the system exchanges with the return process in which the pressure is constant at 100 kPa. The initial temperature is 300 K and a final 500 K. The system contains 2 g of gas, which behaves in the state field the equation of an ideal gas and its molar heat capacity is cp, m = 43.0 J/g K. cv = 0.0346 J/g. Karrow_forward
- Four kilograms of carbon dioxide (CO2) is contained in a piston-cylinder assembly with a constant pressure of 2 bar and initial volume of 1m³. Energy is transferred by heat to the CO2 at a rate of 15 W for 2.5 hours. During this process, the specific internal energy increases by 10 kJ/kg. If no change in kinetic and potential energy occur. determine: (a) The heat transfer, in kJ. (b) The final volume, in m³.arrow_forwardThe synthesis of methanol from carbon monoxide and hydrogen is carried out in a continuous vapor-phase reactor at 5.00 atm absolute. The feed contains cO and H2 in stoichiometric proportion and enters the reactor at 25.0°C and 5.00 atm at a rate of 31.1 m³/h. The product stream emerges from the reactor at 157°C. The rate of heat transfer from the reactor is 21.0 kW. Calculate the fractional conversion (0 to 1) of carbon monoxide achieved and the volumetric flow rate (m3/h) of the product stream. f = Vout ! m3/harrow_forwardwwW SUBJECT: THERMODYNAMIC COURSE: I ASSI.LACTURE: NATIQ ABBAS 5- A vacuum gage connected to a tank reads (15 kPa) at a location where the barometric reading is (750 mm Hg). Determine the absolute pressure in the tank. Take PHg (13,590 kg/m³)? 6- A gas is contained in a vertical, frictionless piston-cylinder device. The piston has a mass of (4 kg) and a cross-sectional area of (35 cm2). A compressed spring above the piston exerts a force of (60 N) on the piston. If the atmospheric pressure is (95 kPa), determine the pressure inside the cylinder. 60 N P. atra = 95 kPa mp= 4 kg dea? OF SITYarrow_forward
- 7. A 0.5 m3 rigid tank contains nitrogen gas at 600 kPa and 300 K. Now the gas is compressed isothermally to a volume of 0.1 m3. The work done on the gas during this compression process is: Oa) -720 kJ Ob) -175 kJ Oc) -483 kJ Od) -143 kJ Oe) None of abovearrow_forwardA mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns then into gaseaous products. the cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. the cylinder is also submerged in a large insulated water bath. From previous experiments, this chemical reaction is known to release 173.kJ of energy. the temperature of the water bath is monitored, and it is determined from this data that 37.2kJ of heat flows out of the system during the reaction. Is the reaction exothermic or endothermic? Does the temperature of the water bath go up or down? Does the piston move in or out? Does the gas mixture do work, or is work done on it? How much work is done on (or by) the gas mixture? Round your answer to 3 significant digits.arrow_forward8. An ideal gas from an initial state of 21°C and 1 atm is compressed adiabatically to 65.6°C followed by Isobaric cooling to 21°C and finally expanded isothermally to its original state. Calculate Q, W, AH. and AU for each step and for the entire process. If same changes are brought about by an irreversible process which quantity will differ and by how much? Take efficiency to be 75%. Cv =3/2Rarrow_forward
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