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Rzqust [24]
3 years ago
5

On a potential energy diagram for the following processes, which of the following has an increase in entropy?

Chemistry
2 answers:
daser333 [38]3 years ago
7 0
Hello,

I believe that your answer would be <span>B. water freezes
</span>Hope this helps
Vaselesa [24]3 years ago
3 0

Answer: A. ice melts

Explanation: Entropy is the measure of randomness. A molecule with high disorder has high entropy.

When ice melts, solid changes to liquid and thus the molecules become more disordered.

When water freezes, liquid changes to solid, and thus the molecules become more ordered.

When steam condenses, gas changes to liquid and thus molecules become more ordered.

When water cools down in a refrigerator, liquid changes to solid, and thus the molecules become more ordered.


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10) How many grams are there in 1.00 x 10^24 molecules of BC13?
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194.5 g of BCl₃ is present in 1 × 10²⁴ molecules of BCl₃.

Explanation:

In order to convert the given number of molecules of BCl₃ to grams, first we have to convert the molecules to moles.

It is known that 1 moles of any element has 6.022×10²³ molecules.

Then 1 molecule will have \frac{1}{6.022*10^{23} } moles.

So 1*10^{24} molecules = \frac{1*10^{24} }{6.022*10^{23} } =1.66 moles

Thus, 1.66 moles are included in BCl₃.

Then in order to convert it from moles to grams, we have to multiply it with the molecular mass of the compound.

As it is known as 1 mole contains molecular mass of the compound.

As the molecular mass of BCl₃ will be

Molecular mass of BCl_{3}= Mass of Boron + (3*Mass of chlorine)

Mass of boron is 10.811 g and the mass of chlorine is 35.453 g.

Molar mass of BCl₃ = 10.811+(3×35.453)=117.17 g.

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grams of BCl_{3}=117.17*1.66=194.5 g

So, 194.5 g of BCl₃ is present in 1 × 10²⁴ molecules of BCl₃.

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