Recent activity by BessieBrobst

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Design a distillation column for the separation of a binary mixture of ethanol and water, with a feed consisting of 50 weight percent ethanol and 50 weight percent water. The column should be able to produce a distillate product containing at least 90 weight percent ethanol, with a recovery of at least 95 weight percent of the ethanol in the feed. The feed rate is 1000 kg/hr and the reflux ratio should be optimized for the best separation efficiency. Determine the number of theoretical trays required for the column design and calculate the heat load required for the operation of the column.

answered 2 days ago in Chemical engineering

1 answer 25 views

Calculate the standard enthalpy change for the reaction: C2H5OH(l) + 3 O2(g) → 2 CO2(g) + 3 H2O(l), given the following standard enthalpies of formation: ΔHf°[C2H5OH(l)] = -277.69 kJ/mol, ΔHf°[CO2(g)] = -393.51 kJ/mol, ΔHf°[H2O(l)] = -285.83 kJ/mol.

answered 2 days ago in Chemical thermodynamics

1 answer 20 views

Calculate the standard enthalpy change for the reaction: 2C2H5OH(l) + 9O2(g) -> 6CO2(g) + 8H2O(l) given that the standard enthalpy of formation for C2H5OH(l) is -278 kJ/mol, for CO2(g) is -394 kJ/mol and for H2O(l) is -286 kJ/mol.

asked 2 days ago in Chemical thermodynamics

1 answer 6 views

A voltaic cell consists of a standard hydrogen electrode and a copper electrode in a solution of copper(II) sulfate. The measured cell potential is 0.78 V at 25°C. If the concentration of copper(II) sulfate is 0.1 M, what is the resistance of the electrochemical cell?

asked Jan 22 in ElectroChemistry

1 answer 23 views

Where do cognitive psychologists believe that personality comes from?

answered Jan 20 in Psychology

1 answer 21 views

Which division of the autonomic nervous system controls processes like digestion, heartbeat, and breathing?

answered Jan 8 in Science

1 answer 22 views

What lets different species of anole lizards live in the same area without competing?

asked Jan 7 in Science

1 answer 31 views

What is composed of very long strands of glucose monomers, is largely indigestible and comprises the cell walls of plants?

asked Jan 6 in Science

1 answer 49 views

What is a polymer formed by chain addition reactions between monomers that contain a double bond called?

answered Jan 6 in Science

1 answer 20 views

What do we call the only light that people can see?

asked Jan 6 in Science

1 answer 25 views

How many electrons are in the hydrogen atom?

asked Dec 30, 2024 in Science

1 answer 20 views

The net effect of aldosterone is to conserve and increase water levels in the plasma by reducing the excretion of what element, and thus water?

answered Dec 30, 2024 in Science

1 answer 33 views

What is the multicellular diploid stage called?

answered Dec 27, 2024 in Science

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