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Ghella [55]
3 years ago
8

How is it that when a salt sample dissolves in water, the delta S for the process is positive?

Chemistry
1 answer:
Bess [88]3 years ago
4 0

Answer:-

Water is highly ordered. In water each oxygen atom is connected to others around it through hydrogen bonding via bridging hydrogen atoms. When a salt like NaCl is dissolved, some of these Hydrogen bonds break.

When a salt like NaCl dissolves in water, the NaCl breaks in to ions Na+ and Cl-.

The water molecules now surround these ions.

The slightly negative oxygen end of water molecule gets near the Na+, while the slightly positive Hydrogen of water molecule gets near the Cl-.

So before salt sample dissolve, the water molecules were highly ordered due to hydrogen bonding. Now after salt dissolve there is a decrease in order and thus an increase in disorder of the water molecules.

Due to increase in disorder, entropy which is a measure of disorder increases. Since entropy increases, delta S for the process is positive.

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skad [1K]
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? Cal ---------- 130.0 J

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hope this helps!


6 0
3 years ago
The density of water at 4 degrees Celsius is 1.00 g/cm cubed at unknown object has density of 7.9 g/cm cubed would you expect it
NNADVOKAT [17]

Answer:

The object will be sank

Explanation:

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The object occupies more volume, so it occupies more mass.

As the mass from the object is higher, the object will be sank because the weight is higher than the weight from the liquid.

If the object has a lower density than the water, it will float on it.

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3 years ago
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Answer:

33.7

Explanation:

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7 0
3 years ago
I need help with these questions, please!
lbvjy [14]

Answer:

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4. 4Fe + 3O2 → 2Fe2O3

5. It uses the process of fission.

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7. Nuclear power plants produce little to no greenhouse gas.

Nuclear power plants produce a large amount of energy for a small mass of fuel.

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6 0
3 years ago
Does the identity of gas matter when predicting its behavior why or why not?
just olya [345]

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Explanation:

4 0
3 years ago
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