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Design a heat exchanger that can transfer heat from a 10,000 L/h hot water stream at 80°C to a 5,000 L/h cold water stream at 20°C with a maximum temperature difference of 10°C. Calculate the required heat transfer area and select appropriate materials for the heat exchanger components based on the fluids' properties and operating conditions.

asked 3 days ago in Chemical engineering by AliceCahill0 (510 points)

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1 answer 47 views

Design a distillation column that can effectively separate a mixture containing 50 wt% methanol and 50 wt% water. The column should produce a distillate with no more than 5 wt% methanol and a bottom product with no more than 2 wt% water. The feed rate is 1000 kg/h and the column must operate at atmospheric pressure. Assume that the feed is a saturated liquid and that the methanol-water mixture behaves as an ideal solution. Provide the design specifications for the column, including the number of trays or packing height, diameter, and other necessary specifications.

asked 4 days ago in Chemical engineering by ShawneeSalmo (290 points)

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1 answer 6 views

How can an engineer design a safe and efficient system for the storage and transportation of hazardous chemicals, taking into consideration factors such as temperature, pressure, material compatibility, and environmental impact?

asked 3 days ago in Chemical engineering by EveretteLcr6 (710 points)

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1 answer 6 views

How can a process be developed for the production of 1,4-dioxane using the principles of chemical engineering, and what are the key variables that need to be considered in the design and optimization of the process?

asked 3 days ago in Chemical engineering by Lorena01B177 (510 points)

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1 answer 6 views

How can a heat exchanger be designed to efficiently transfer heat between a hot stream of ethanol vapor and a cool stream of water, with a flow rate of 10 L/min of each fluid, while maintaining a temperature difference of 5 °C between the inlet and outlet of each stream?

asked 3 days ago in Chemical engineering by DellShilling (450 points)

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1 answer 6 views

How can a cost-effective and efficient system be designed to extract valuable metals like gold and silver from electronic waste, while minimizing environmental impact and complying with regulatory standards?

asked 3 days ago in Chemical engineering by BeatriceBerm (570 points)

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1 answer 50 views

Calculate the standard enthalpy of formation of hydrogen fluoride (HF) given the following reactions and enthalpy change values:2H2(g) + O2(g) → 2H2O(g) ΔH° = -484 kJH2(g) + Cl2(g) → 2HCl(g) ΔH° = -184 kJ1/2 F2(g) + H2(g) → HF(g) ΔH° = -273 kJ.

asked 4 days ago in ThermoChemistry by MadelineColl (770 points)

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1 answer 53 views

Calculate the standard enthalpy change for the fusion reaction of 50g of ice at 0°C with 450g of liquid water at 25°C. The molar enthalpy of fusion of ice is 6.01 kJ/mol and the specific heat capacity of water is 4.18 J/g·°C. Assume there are no heat losses to the surroundings.

asked 4 days ago in Chemical thermodynamics by JamisonNoel (670 points)

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1 answer 6 views

How can a chemical engineer develop a process for the production of 1 ton of sulfuric acid with a concentration of 98% at a desired temperature and pressure using a specific raw material feedstock and considering the economic feasibility of the process?

asked 3 days ago in Chemical engineering by EzraHudgins6 (410 points)

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1 answer 5 views

How can chemical education be redesigned to increase representation and diversity in the chemistry field, and why is diversity important for the advancement of the field?

asked 3 days ago in Chemical education by ReganHannam5 (370 points)

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1 answer 6 views

Here's a specific problem for the student to solve:Consider the reaction A(g) + B(g) ↔ C(g) with a standard enthalpy change of reaction (ΔH°rxn) of -50 kJ/mol at 298 K. If the initial concentrations of A and B are both 1.0 M, what will be the equilibrium concentration of each gas at 298 K? The equilibrium constant (Kc) for the reaction at 298 K is 2.75 x 10^-2.

asked 3 days ago in Physical Chemistry by ClaritaCress (250 points)

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1 answer 48 views

Calculate the vibrational frequencies and corresponding infrared spectra of HF molecule using quantum mechanical methods.

asked 4 days ago in Quantum Chemistry by VilmaOlivas5 (430 points)

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1 answer 27 views

Design a heat exchanger for a chemical plant which produces 1000 kg/hr of a chemical at a temperature of 350°C. The chemical needs to be cooled down to 50°C using water at an inlet temperature of 25°C. The cooling water flow rate should not exceed 5000 kg/hr. The overall heat transfer coefficient should be at least 500 W/m2K. Determine the surface area of the heat exchanger required for this process.

asked 3 days ago in Chemical engineering by RalphLamingt (510 points)

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1 answer 6 views

Here's a precise problem for a chemistry student to solve related to designing a heat exchanger for a specific process:A chemical plant produces a product with a flow rate of 500 liters per hour, and it needs to be cooled from its initial temperature of 120°C to its final temperature of 80°C before it can be packaged for shipment. The cooling medium that will be used is water, which is available at a flow rate of 400 liters per hour and an initial temperature of 20°C. Design a heat exchanger to cool the product and determine the required surface area of the heat exchanger if the overall heat transfer coefficient is 500 W/m2K.

asked 3 days ago in Chemical engineering by LXKVilma3586 (450 points)

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1 answer 44 views

Design a distillation column that can effectively separate a mixture of ethanol and water with a composition of 60% ethanol and 40% water. The distillation column should have a reflux ratio of 1.5 and a total of 10 theoretical stages. Determine the operating conditions (temperature, pressure, and feed rate) needed to achieve a distillate product with a composition of 95% ethanol and a bottoms product with a composition of 5% ethanol.

asked 4 days ago in Chemical engineering by MoseTall8858 (530 points)

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1 answer 26 views

Design a heat exchanger for a chemical process that requires heating of 50 kg/hr of water from 25°C to 80°C using steam as the heating medium. The available steam is at a pressure of 1.5 MPa and a temperature of 300°C. The overall heat transfer coefficient between the water and the steam is 600 W/m2K. The heat exchanger should be designed to accommodate a temperature drop of 5°C for both the water and the steam. Determine the required surface area of the heat exchanger and the mass flow rate of steam required to meet the process requirements.

asked 3 days ago in Chemical engineering by RolandoT7187 (370 points)

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1 answer 6 views

Given a mixture of benzene and toluene, with a mole fraction of 0.6 and 0.4 respectively, design a distillation column with a reflux ratio of 2.5 to achieve a product purity of at least 99% for both components.

asked 3 days ago in Chemical engineering by TraceyBly383 (630 points)

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1 answer 6 views

Explain the role of ion channels in signal transduction pathways and provide an example of a specific ion channel and its function in cellular signaling.

asked 3 days ago in BioChemistry by AlexandraCru (510 points)

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1 answer 47 views

Calculate the standard enthalpy of formation of methane (CH4) given the following enthalpy data: C(graphite) + 2H2(g) → CH4(g) ΔH° = -74.8 kJ/mol ΔH°f[C(graphite)] = 0 kJ/molΔH°f[H2(g)] = 0 kJ/mol (Hint: Use Hess's Law and the fact that the standard enthalpy of formation of an element in its most stable state is zero.)

asked 4 days ago in ThermoChemistry by DamianPelloe (610 points)

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1 answer 43 views

Design a chemical reactor to produce 500 kg of ethylene oxide per hour from ethylene and oxygen gases. Assume the reaction occurs isothermally, and the reactor operates at 3 atm and 250°C. The conversion of ethylene to ethylene oxide is 90%, and the selectivity of ethylene oxide is 97%. You can use either a plug-flow reactor or a continuous stirred-tank reactor. Determine the volume and dimensions of the reactor, and also its cost, assuming a stainless steel construction.

asked 4 days ago in Chemical engineering by AlexandraVer (510 points)

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