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3 years ago

Use the drop-down menus to complete the sentences describing what happens when the temperature of a fluid

Chemistry

2 answers:

Anton [14]3 years ago

8 0

Answer:

increases

decreases

rises

Explanation:

Scorpion4ik [409]3 years ago

5 0

when the temperature of a fluid increases the kinetic energy of the molecules increases.

Explanation:

when there is a change in liquid temperature then there will be changes in its properties especially in the (KE) kinetic energy of molecules and the density of the fluid.
Due to the addition of the heat kinetic energy of the fluid molecules as it gains the heat, the intermolecular movement increases so there will be in the increased collision between the molecules which results in breaking the intermolecular force.
Whenever the heat is applied to any matters nature is to tend to expand so the fluids also expand which results in the decrease in the density of the liquid.
And also due to the increases in the kinetic energy, the speed of the fluid also increases.

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The actual number of atoms of each element present in the molecule of the compound is represented by the formula known as molecular formula.

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Mass of each element present in the unknown compound is determined as:

Mass of carbon, $C$ :

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Mass of hydrogen, $H$ :

$\frac{4.5}{100}\times 223.94 = 10.08 g$

Mass of chlorine, $Cl$ :

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Number of moles of $C$ :

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Number of moles of $H$ :

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$number of moles = \frac{141.79}{35.5} = 3.99 mole\simeq 4 mole$

Dividing each mole with the smallest number of mole, to determine the empirical formula:

$C_{\frac{6}{4}}H_{\frac{10}{4}}Cl_{\frac{10}{4}}$

$C_{1.5}H_{2.5}Cl_{1}$

Multiplying with 2 to convert the numbers in formula into a whole number:

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In order to determine the molecular formula:

n = $\frac{molar mass}{empirical mass}$

n = $\frac{223.94}{112} = 1.99 \simeq 2$

So, the molecular formula is:

$2\times C_{3}H_{5}Cl_{2} = C_{6}H_{10}Cl_{4}$

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