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3 years ago

Compare the entropy of a firecracker before it is lighted to its entropy after it explodes

1 answer:

3 0

The entropy of a firecracker is much less before it explodes than afterwards.
Entropy is a measure of the degree of disorder in a system.
Before the explosion, everything is packed in a small volume inside a cardboard tube.
After the explosion, the contents have been converted largely to gases and finely divided solids spread over a large volume of the sky.
The latter situation is more disordered, so it has a higher entropy.

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Determine the mass of 4.25x10^26 formula units of barium hydroxide

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$4.25x10x^{26}$

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3 years ago

using the two ways you have learned about between temperature, pressure and volume, what are two ways you could increase the gas

IrinaVladis [17]

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2 years ago

8. Select the lattice energy for rubidium chloride from the following data (in kJ/mol]

yKpoI14uk [10]

Answer:

Option C

Explanation:

The chemical reactions which are involved while solving this problem is there in the file attached and each chemical reaction is represented by a certain equation number

Lattice energy for rubidium chloride ( RbCl) is represented by the equation 6

Equation 1 represents the change in enthalpy for formation of RbCl

Equation 2 represents the sublimation reaction of rubidium

Equation 3 represents the ionization enthalpy of rubidium

Equation 4 represents the enthalpy of atomization of chlorine which means it describes the bond enthalpy of Cl2 molecule

Equation 5 represents the electron affinity of chlorine

To find the lattice energy for RbCl we have to use all the equations from 1 to 5 so that at last we get the equation 6

We have to perform operations such as

Equation 1 - equation 2 - equation 3 - equation 4 - equation 5

By performing these operations the intermediate compounds gets cancelled and at last we get equation 6

So Equation 1 ≡ ΔH $_{f}$ = -431 kJ/mol

Equation 2 ≡ Rb(s) ---> Rb(g) = 85.8 kJ/mol

Equation 3 ≡ IE1(Rb) = 397.5 kJ/mol

Equation 4 ≡ BE(Cl2) = 226 kJ/mol

Equation 5 ≡ Electron Affinity Cl = -332 kJ/mol

Value corresponding to the equation 6 will be the value of lattice energy of RbCl and the value is -695·3 kJ/mol

∴ Lattice energy for rubidium chloride is approximately -695 kJ/mol

4 0

3 years ago

Entropy A. has a strong odor B. is a measure of correlation between numeric variables C. is used to calculate information gain D

Bingel [31]

Correct option:

Entropy is used to calculate information gain.

What is entropy?

Entropy is the measure of data's uncertainty or randomness; the greater the randomness, the higher the entropy. Entropy is used by information gain to make choices. Information will increase if the entropy decreases.

Decision trees and random forests leverage information gained to determine the appropriate split. Therefore, the split will be better and the entropy will lower the more information gained.
Information gain is calculated by comparing the entropy of a dataset before and after a split.
Entropy is a way to quantify data uncertainty. The goal is to maximize information gain while minimizing entropy. The method prioritizes the feature with the most information, which is utilized to train the model.
Entropy is actually used when you use information gain.

Learn more about entropy here,

brainly.com/question/22145368

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3 0

2 years ago

Please Help thank you

Harlamova29_29 [7]

I suppose because of the fact that the relative humidity is taking away your heat and making you feel cool, I think that you would feel cooler than someone who was dry.

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3 years ago