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8 months ago

1. Why do you think pepper behaved the way it did in this experiment? What do you think that sugar and salt would do?

Chemistry

1 answer:

goblinko [34]8 months ago

6 0

The experiment is related to the demonstration using Pepper. When pepper is spread over water, it clumps together This is because pepper is hydrophobic. When repeated with sugar and salt, they instantly dissolved. This means they are attracted to water. When also sprinkled on the surface of the water, it floats. This is caused by surface tension.

To break the surface tension of water, one can use aeration or the use of chemicals such as soap molecules which contain a long chain of hydrogen as well as carbon atoms.

<h3>What is surface tension?</h3>

Surface tension is the propensity of liquid surfaces at rest to shrink to the smallest feasible surface area. Surface tension permits items with a higher density than water, such as razor blades and insects (such as water striders), to float on the water's surface without being immersed.

A force tensiometer can be used to measure surface tension. The forces exerted on a probe situated at the liquid-gas or liquid-liquid interface are measured by these devices.

Learn more about Surface Tension:
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What is the key difference that causes the atoms of one element to differ from the atoms of the other elements? A the number of

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B = the number of protons

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2 years ago

A unit of heat energy that was formerly used frequently was the calorie. Look up the definition of the calorie in your textbook

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Answer and Explanation:

Calorie is the unit of heat energy . There are 2 units with the same name 'calorie' which is widely used.

'The amount of heat energy required to increase the temperature of 1 gram of water by mass by $1^{\circ}C$ or 1 K is known as small calorie or gram calorie'.

Another one is large calorie which can be defined as :

'The amount of heat energy required to make arise in temperature of water 1 kg by mass by $1^{\circ}C$ or 1 K is known as large calorie or kilcalorie and is represented as Cal or kcal'.

After the adoption of SI system, thee units of the metric system cal, C or kilocal are considered deprecated or obsolete with the SI unit for heat energy as 'joule or J'

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Calorimeter constant, represented as ' $C_{cal}$ ' is used to quantify the heat capacity or the amount of heat of a calorimeter.

It can be calculated by ther given formula:

$C_{cal}}={\frac {\Delta {H}}{\Delta {T}}}}$

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${\Delta {T}}$ = corresponding temperature change

${\Delta {H}$ = enthalpy change

Its unit is J/K or J/1^{\circ}C[/tex] which can be convertyed to cal/1^{\circ}C[/tex] by dividing the calorimeter constant by 4.184 or 4184 accordingly.

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