A catalyst is added to a system at equilibrium. If the temperature remains constant, the activation energy of the forward reaction(1) decreases(2) increases(3) remains the same
Answers
When a catalyst is added to a system the equilibrium concentration remains unchanged. A catalyst increases the activation energy of the forward reaction. The correct option is 2.
What is a catalyst?
A substance which increases the rate of a reaction without itself undergoing any permanent change chemically or quantitatively is defined as the catalyst and the phenomenon is known as the catalysis. It is believed that a catalyst usually participates in the chemical reaction and it speeds up.
In short, the catalyst lowers the energy barrier and thereby provides a different path of lower activation energy for the reaction so that the rate of the reaction increases.
A catalyst speeds up both the forward and backward reactions to the same extent and does not alter equilibrium constant. Thus it speeds up the attainment of equilibrium faster.
Thus the correct option is 2.
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And increase the rate of the backward to the same extent thus not affecting equilibrium.
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a. True
b. False
Answers
Answers
Answer:
Explanation:
PCl₅ ⇄ PCl₃ + Cl₂
1 mole 1 mole 1 mole
molecular weight of PCl₅ = 208.5
molecular weight of PCl₃ = 137.5
molecular weight of Cl₂ = 71
moles of PCl₅ = .0185
moles of PCl₃ = .0924
moles of Cl₂ = .1873
Total moles = .2982 moles
mole fraction of PCl₅ = .062
mole fraction of PCl₃ = .31
mole fraction of Cl₂ = .628
If total pressure be P
partial pressure of PCl₅ = .062 P
partial pressure of PCl₃ = .31 P
partial pressure of Cl₂ = .628 P
Kp = .31 P x .628 P / .062 P
= 3.14 P
To calculate Total pressure P
PV = nRT
P x 4 x 10⁻³ = .2982 x 8.31 x 600
P = 371.7 x 10³
= 3.717 x 10⁵ Pa
Kp = 3.14 P = 3.14 x 3.717 x 10⁵ Pa
= 11.67 x 10⁵ Pa
Kp = Kc x
= 1
11.67 x 10⁵ = Kc x
Kc = 234
A series of chemical changes that wears away at rocks
The movement of rocks from one area to another
Any large-scale event such as volcanic eruptions or earthquakes
A process that breaks down large rocks into smaller piec
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Answer:
D. A process that breaks down large rocks into smaller pieces.
Explanation:
Physical weathering if referred to the process of rocks breaking apart without changing their chemical composition. If you look at the other answers, none of them match the description of physical weathering.
Answer:
A process that breaks down large rocks into smaller pieces.
methyl alcohol
ethyl alcohol
isopropyl alcohol
none of the above
Answers
Ethyl alcohol (CH3CH2OH) : Most commonly found in alcoholic beverages.
Isopropyl alcohol (C3H8O) : Is what is known as rubbing alcohol, most commonly used as a cleansing liquid.
Methyl alcohol (CH3OH) : Is most commonly used as formaldehyde, jet fuel, and antifreeze.
So looking at our options we can conclude that the correct answer choice would be Methyl Alcohol because it is used as an additive in jet fuel.
Hope this helps! If you have any other questions or would like further explanation just let me know! :)
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hope this helps!
Answers
Final answer:
Magnesium oxide (MgO) is an ionic compound formed by the transfer of electrons from magnesium to oxygen, resulting both atoms being electronically stable. Its properties include having high melting and boiling points, being a good electrical insulator but a thermal conductor.
Explanation:
Magnesium oxide, often referred to as 'MgO,' is a compound comprised of two different elements: magnesium and oxygen. It is a type of ionic compound because it is formed by a metal, magnesium, and a non-metal, oxygen. This creation occurs through a process called ionic bonding, where the magnesium atom effectively donates two electrons to the oxygen atom. Consequently, both atoms achieve a stable electronconfiguration.
In its solid state, MgO takes a form of a white, crystal-like substance. It's generally known for its high melting and boiling points, reflecting the strong ionic bonds in oxide structure. Furthermore, the compound stands out for being a good electrical insulator, but a thermal conductor.
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