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3 years ago

What element is black soot made of?

Chemistry

1 answer:

Y_Kistochka [10]3 years ago

3 0

It is composed of coal and is produced by incomplete combustion of coal, oil wood, or other fuels

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Consider the reactionI2(g) + Cl2(g)2ICl(g)Using standard thermodynamic data at 298K, calculate the entropy change for the surrou

Georgia [21]

We know,

$\Delta H_{I_2(g)}=62.438\ KJ/mol\\\\\Delta H_{Cl_2(g)}= 0.0\ KJ/mol\\\\\Delta H_{ICl(g)}=17.78\ KJ/mol$

For given reaction, $I_2(g)+Cl_2(g)\ -->\ 2ICl(g)$

$\Delta H_{rxn}=2\Delta H_{ICl(g)}-\Delta H_{I_2(g)}-\Delta H_{Cl_2(g)}\\\\\Delta H_{rxn}=2(17.78)-0-62.438\ KJ/mol\\\\\Delta H_{rxn}=-26.878\ KJ/mol$

For , 2.41 moles of $I_2$ :

$\Delta H_{rxn}=2.41\times (-26.878)\ KJ\\\\\Delta H_{rxn}=-64.78\ KJ$

We know :

$\Delta S = -\dfrac{\Delta H_{rxn}}{T}\\\\\Delta S = -\dfrac{-64.78}{298}\ KJ/K\\\\\Delta S =-0.21738 \ KJ/K\\\\\Delta S=-217.38\ J/K$

Hence, this is the required solution.

7 0

4 years ago

2 propanoate on oxidation gives ?

TiliK225 [7]

Answer:

l hope it will help u:-)

7 0

3 years ago

A solution is prepared by dissolving 50.0g C6H12O6 in 250g of water. What is the freezing point?

Vedmedyk [2.9K]

50.0g C6H12O6 in 250g

6 0

3 years ago

What is the minimum amount of energy that can be gained or lost by an atom?

Dahasolnce [82]

Answer:

quantum (93) the minimum quantity of energy that can be lost or gained by an atom (plural: quanta)

Explanation:

A quantum is the minimum amount of any physical entity involved in an interaction.

4 0

4 years ago

How to calculate the mass of copper

faust18 [17]

You can acquire the atomic mass of any chemical element by using the periodic table. I've provided an example on a document below to help you identify the components of an element block from the periodic table. Now if you want to find the mass of an exact amount of a substance you use moles for that. That's why it's called molar mass. To find the molar mass of a substance follow this little guide:

Start with the number of grams of each element given.
Convert the mass of each element to moles utilizing the molar mass from the periodic table.
Divide each mole value by the smallest number of moles deciphered.
Round your answer. This is the mole ratio of the element.

*Use the third document I've inserted below to follow the guide.

*All documents used here are property of their respective owners*

7 0

3 years ago

Read 2 more answers