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3 years ago

As the solar oven operate, what happens to the kinetic energy of the particles of matter in the air and the food inside

Chemistry

1 answer:

umka2103 [35]3 years ago

6 0

Answer:

The average kinetic energy of the particles of matter in the air and the food inside increases

Explanation:

The relationship between the average Kinetic energy and temperature is given by the following formula

K = 3×R×T/(2× $N_A$ )

Where;

R = The universal gas constant = 8.314 J/(mol·K)

$N_A$ = Avogadro's number = 6.02 × 10²³ atoms/mol

T = The temperature of the gases in Kelvin

Given that a solar oven is able to raise the temperature to about 200°F, food cooks slower than in a conventional oven

However, given that the temperature and the average kinetic energy are directly related, the average kinetic energy rises.

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Taking advantage of their large differences in pKa values, describe how a mixture of phenol and benzoic acid in diethyl ether so

Marat540 [252]

Answer:

By adding bicarbonate.

Explanation:

The pka of the phenol (C₆H₅OH) is 10 and the pka of the benzoic acid (C₆H₅COOH) is 4, which means that the benzoic acid is a stronger acid than phenol, so if we want to separate phenol from benzoic acid in diethyl ether we need to first use a weak base that will react with benzoic acid and not with the phenol:

C₆H₅-COOH + HCO₃⁻ ⇄ C₆H₅-COO⁻ + H₂CO₃

C₆H₅-OH + HCO₃⁻ ⇄ no reaction

The reaction of the benzoic acid with bicarbonate will produce the benzoate ion that will be soluble in the aqueous layer, while the phenol will remain dissolved in the organic layer, so we can separate the two of them by the separation of the two immiscible layers.

Having the two layers separated, the benzoic acid can be recovered from the aqueous layer by adding HCl:

C₆H₅-COO⁻ + HCl ⇄ C₆H₅-COOH + Cl⁻

<u>This acid will precipitate from the aqueous solution, and the solid can be isolated by filtration</u>.

The phenol in the organic layer can be dissolved into an aqueous layer by the adding of a strong base like NaOH:

C₆H₅-OH + OH⁻ ⇄ C₆H₅-O⁻ + H₂O

The phenoxide ion soluble in the aqueous layer can be recovered later by the adding of HCl, which will form the original phenol:

C₆H₅-O⁻ + HCl ⇄ C₆H₅-OH + Cl⁻

<u>The precipitated phenol can be isolated by filtration. </u>

This way we can separate a mixture of phenol and benzoic acid in diethyl ether solution.

I hope it helps you!

6 0

3 years ago

Suggest two ways to liquefy the gases.

aleksandr82 [10.1K]

There are two ways to liquefy a gas:

-- Increase the pressure on it.

-- Lower its temperature.

The liquefication is faster and easier if you do both.

3 0

3 years ago

A scientific _______ is an explanation for how something occurs. It is supported by a great deal of evidence.

Minchanka [31]

Law, since "It is supported by a great deal of evidence. A theory is almost like an educated guess but a little more complex. Someone can have a theory and try to predict the outcome, which could be how they want it to go or how they don't want it to go. With a law, the scientist is basically certain of the outcome due to the evidence that was provided when the law was created.

5 0

3 years ago

HELP FAST FOR BRAINLIEST

krek1111 [17]

Answer:

only ones ik

14: dependant

18: constraints

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3 years ago

Using the diluted solution from the 100-mL volumetric flask, rinse a 1-mL vol. pipet with a few drops and then pipet exactly 1.0

lara [203]

Answer:

The color of the solution turned a clear brown sort of a copper color

Explanation:

The color of the solution turned a clear brown sort of a copper color.

This is because ASA and the FeCl3 are reacting in a manner that it is resulting in the creation of a metal.

4 0

3 years ago