The normal boiling point of water is 100ºc and the normal boiling point of ethanol is 78.5ºc. these two liquids are soluble in each other. what technique would you use to separate these two liquids from the solution?

Fractional Distillation

Explanation:

Fractional Distillation is the appropriate technique to separate a mixture of ethanol and water because this technique relies on the difference between the boiling point of liquid substances.

The boiling point of ethanol is 78.5ºC and the boiling point of water is 100ºC, so when these substances are heated, ethanol will evaporate at 78.5ºC and water will remain as a liquid while the temperature doesn't reach the boiling point of water.

The mixture is poured into a round bottle flask and is heated until ethanol's boiling point is reached (78.5ºC). Ethanol turns into a gas and rises through a fractioning column attached to the flask. The vapour lows its temperature along the column and when the temperature at the top of the column reaches 78.5ºC ethanol passes to a condenser.

A condenser is an apparatus attached to the column that causes the condensation of the vapour. Once ethanol passes through the condenser it turns into a liquid which is collected in a beaker.

When all the ethanol is collected, the temperature is raised to the boiling point of water (100ºC) and it is collected in a different beaker.

That way ethanol will be in a flask and water in another flask.

you need to give more information

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j