Answer:
the enthalpy change for this reaction is -57.7 kJ/mol
Explanation:
Given:
HB₂O₃ = -1272.8 kJ/mol
HCOCl₂ = -218.8 kJ/mol
HBCl₃ = -403.8 kJ/mol
HCO₂ = -393.5 kJ/mol
Those are all standard enthalpies
Question: Calculate the enthalpy change for this reaction, ΔHreaction = ?
The enthalpy of the reaction is calculated using the standard enthalpies of formation of both products and reagents. To understand better, the reaction is as follows
B₂O₃ + 3COCl₂ → 2BCl₃ + 3CO₂
Where the compounds on the left are the reactants and the compounds on the right are the products
ΔHreaction = ∑ΔHproducts - ∑ΔHreactants
Please be careful with the signs.
The reaction quotient will be half of the equilibrium constant of the system.
<h3>Equilibrium constant</h3>
The term equilibrium constant refers to a number that shows the extent to which reactants are converted to products when the reaction has attained equilibrium. If the system is not at equilibrium, the number is called the reaction quotient.
If the reaction system is diluted to about twice its original volume, it follows that the reaction quotient will be halved with respect to the equilibrium constant hence the most likely value of the equilibrium constant is about half of the equilibrium constant.
Learn more about equilibrium constant: brainly.com/question/17960050
The correct answer is polarizing power increase.
The polarizing power of these ions grows as they move through a period because their charge increases and their size decreases. The size grows and the polarizing strength reduces as one descends a group. These two effects somewhat cancel each other out while travelling diagonally, preventing a noticeable change in attributes. As a result, the attributes of these diagonally oriented elements behave similarly.
What is polarizing power?
The capacity of a cation to distort an anion is known as its polarization power. The term "polarizability" refers to an anion's propensity to get polarized by a cation. The charge and radius of a cation affect its ability to polarize. The relationship between charge and radius and cation polarization power. Because they are directly proportional to one another, polarization power of the cation increases as cation charge increases.
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Answer:
The answer is 'All of the above'
Explanation:
because the hydrogen ions are represented by the symbol H+, they increase the PH value of a solution if less amount is added but they decrease the PH value of a solution if a larger amount of hydrogen ions are added but still they increase the PH value, and of course, they contribute to a solution by a base.
C:mountain building
Explanation:
Mountain building is also known as orogeny and it is not cause by human interactions with the earth system. Mountains are built by the forces of moving plates and agents of denudation.
- Mountains are extensive and high peaks which are made up of rocks.
- Human interactions on earth do not form rocks especially in the magnitude of a mountain.
- Pollution, deforestation are all due to the activities of man on the earth.
- Mountains are built when the land is pushed up or when materials accumulate to a very extensive form on the earth surface.
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Sedimentary rocks brainly.com/question/2740663
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