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Alex73 [517]
3 years ago
7

The bond enthalpy of the Br–Cl bond is equal to ΔH°rxn for the following reaction. BrCl(g) → Br(g) + Cl(g) Using the follo

wing data, what is the bond enthalpy of the Br–Cl bond?
a. Br2(l) → Br2(g) ΔH°rxn = 30.91 kJ/mol
b. Br2(g) → 2Br(g) ΔH°rxn = 192.9 kJ/mol
c. Cl2(g) → 2Cl(g) ΔH°rxn = 243.4 kJ/mol
d. Br2(l) + Cl2(g) → 2BrCl(g) ΔH°rxn = 29.2 kJ/mol
Chemistry
1 answer:
ddd [48]3 years ago
3 0

Answer:

a. Br2 (l) → Br2(g) ΔH°rxn = 30.91 kJ/mol

Explanation:

Bond enthalpy is the energy which is required to break 1 mol of of bonds in gaseous covalent molecules. Bond breaking process can be endothermic or exothermic depending on the molecules association. The process needs to be performed in chemical laboratory under standard conditions.

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An ideal gas in a cylindrical container of radius r and height h is kept at constant pressure p. The bottom of the container is
Juli2301 [7.4K]

Answer:

m =\frac{p*(pi)*r^{2}*h*mw}{R*\frac{T_{1} + T_{O}}{2}}  

Explanation:

The gas ideal law is  

PV= nRT (equation 1)

Where:

P = pressure  

R = gas constant  

T = temperature  

n= moles of substance  

V = volume  

Working with equation 1 we can get  

n =\frac{PV}{RT}

The number of moles is mass (m) / molecular weight (mw). Replacing this value in the equation we get.

\frac{m}{mw} =\frac{PV}{RT}  or  

m =\frac{P*V*mw}{R*T}   (equation 2)

The cylindrical container has a constant pressure p  

The volume is the volume of a cylinder this is

V =(pi)*r^{2}*h

Where:

r = radius  

h = height  

(pi) = number pi (3.1415)

This cylinder has a radius, r and height, h so the volume is  V =(pi)*r^{2}*h

Since the temperatures has linear distribution, we can say that the temperature in the cylinder is the average between the temperature in the top and in the bottom of the cylinder. This is:  

T =\frac{T_{1} + T_{O}}{2}  

Replacing these values in the equation 2 we get:

m =\frac{P*V*mw}{R*T}   (equation 2)

m =\frac{p*(pi)*r^{2}*h*mw}{R*\frac{T_{1} + T_{O}}{2}}    

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4 years ago
Would the term light year- the distance light travel in a year, or 9.5 trillion km-be useful in a model of the solar system
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3 years ago
Number the steps for balancing equations:
adelina 88 [10]

Answer:

identify the atoms on each side.

Count the atoms on each side.

Use coefficients to increase the atoms on each side.

Check to make sure you have the same number of each type of atom on each side.

Explanation:

The concept behind balancing chemical equations is to ensure that they comply with the law of conservation of matter. This helps to make chemical equations quantitatively meaningful.

  • First, identify the atoms on each side of the expression.
  • Then count these atoms.
  • Assign appropriate numeric coefficient to the species.
  • Then check to make sure there are equal number of each type of atoms on each side.

The subscript of the formula must not be changed in an attempt to balance a chemical equation.

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Using a liquid as a solvent, what could be the state(s) of matter of the solute?
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Solute can be
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Answer:

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