The entropy change ΔS for the combustion of methane to carbon dioxide and liquid water is -242.6 J/mol.K
<h3>What is the Entropy in a Chemical system?</h3>
In a chemical system, Entropy (ΔS) is a quantitative measure of the variety of possible ways to disperse energy inside a chemical system.
- In an isothermal process, entropy is determined as the quantity of heat transmitted to a system.
The chemical reaction for the combustion of methane can be expressed as:
![\mathbf{CH_{4(g)} + 2O_{2(g)} \to CO_{2(g)} + 2H_2O_{(l)}}](https://tex.z-dn.net/?f=%5Cmathbf%7BCH_%7B4%28g%29%7D%20%2B%202O_%7B2%28g%29%7D%20%5Cto%20CO_%7B2%28g%29%7D%20%2B%202H_2O_%7B%28l%29%7D%7D)
The standard entropy of the combustion is expressed as:
![\mathbf{\Delta S^0 =(S^0 _{CO_{2}} + 2 \times S^0 _{H_{2}O} )+(-S^0 _{CH_{4}} -2 \times S^0 _{O_{2}} })](https://tex.z-dn.net/?f=%5Cmathbf%7B%5CDelta%20S%5E0%20%3D%28S%5E0%20_%7BCO_%7B2%7D%7D%20%2B%202%20%5Ctimes%20S%5E0%20_%7BH_%7B2%7DO%7D%20%29%2B%28-S%5E0%20_%7BCH_%7B4%7D%7D%20%20-2%20%5Ctimes%20S%5E0%20_%7BO_%7B2%7D%7D%20%7D%29)
Replacing the standard entropies of the compounds into the above equation, we have:
![\mathbf{\Delta S^0 =(213.8 \8 \ J/mol.K + 2 \times69.92 \ J/mol.K )+(-186.16 \ J/mol.K -2 \times 205.04 \ J/mol.K})](https://tex.z-dn.net/?f=%5Cmathbf%7B%5CDelta%20S%5E0%20%3D%28213.8%20%5C8%20%5C%20J%2Fmol.K%20%2B%202%20%5Ctimes69.92%20%5C%20J%2Fmol.K%20%20%29%2B%28-186.16%20%5C%20J%2Fmol.K%20-2%20%5Ctimes%20205.04%20%5C%20J%2Fmol.K%7D%29)
![\mathbf{\Delta S^0 =-242.6 \ J/mol.K}](https://tex.z-dn.net/?f=%5Cmathbf%7B%5CDelta%20S%5E0%20%3D-242.6%20%5C%20J%2Fmol.K%7D)
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Answer:
area = Iw
Explanation:
area = lw
where
l = length
w = width
Therefore,
The area of the shaded region = area of the big rectangle - area of the small rectangle
Therefore,
area of the big rectangle = (x+10)(2x+5) = 2x² + 5x + 20x + 50 = 2x² + 25x + 50
area of the small rectangle = (x+1)(x+1) = x² + x + x + 1 = x² + 2x + 1
area of the shaded region = 2x² + 25x + 50 - ( x² + 2x + 1)
area of the shaded region = 2x² + 25x + 50 - x² - 2x - 1
area of the shaded region = x² - 23x - 49
Politically correct English refers to the act of changing a word or expression instead of another in order to avoid being offensive. This can apply to situations such as sexism or racism. An example of this would be to use the term "Firefighter" instead of "fireman"
.
I hope thats the answer you wanted/ hope it helps
Answer:
Explanation:
What is Henry's answer to the objection that the colonists are not ready to fight against the British? Henry says that there are enough people with the motivation to achieve independence, which he says will easily defeat any other country. He also says that God is on their side and will help them through the battle.