calculate the average molar bond enthalpy of the carbon-bromine bond in a CBr4 molecule....
given thay :
deltaH= Br(g)= 111.9 kj
dH= C(g)= 716.7 jk
dH= CBr4(g)= 29.4
Homework Answers
• The thermodynamic quantity “enthalpy” is state function that depends on the initial and final states of the system.
• The enthalpy is measured when a system is at the constant pressure; the heat released or absorbed is equal to the change in enthalpy
.
• The bond enthalpy is also known as the bond energy, and it is defined as the energy required for breaking the chemical bonds in a molecule.
• The average molar bond enthalpy can be calculated by dividing the bond enthalpy with total number of bonds present in a molecule.
The arbitrary reaction is given below:
The formulae to calculate the enthalpy of reaction is given below:
![AH.cation = [c(AH° ) +(AH”)]-[a(AH° ) + b(AH”)]
Where,
AH reaction is Enthalpy of reaction,
AH, is Standard change in ent](http://img.homeworklib.com/questions/14fb13b0-4272-11ea-94bc-cd50806dade0.png?x-oss-process=image/resize,w_560)
Consider the formation of 
molecule from its elements.
Given that,
![AH[Br(g)]=111.9kJ
AH[C(g)]=716.7kJ
AH[CBr, (g)]= 29.4kJ](http://img.homeworklib.com/questions/16472300-4272-11ea-b326-1512dca80cf2.png?x-oss-process=image/resize,w_560)
![ΔΗ. =mΔΗ (product)-nΔΗ (reactant)
-[ixΔΗ (CBT)]-[ixΔΗ (C) + 4xΔΗ (Br)]ki
=[29.4]-[(716.7)-4x(111.9)]kJ/mole
=-1134.9kJ](http://img.homeworklib.com/questions/16a7e210-4272-11ea-9761-539774ed002f.png?x-oss-process=image/resize,w_560)
The number of carbon-bromine bonds in 
molecule is four.
Therefore, the average bond enthalpy is given below:
Therefore, the average molar bond enthalpy is 283.725kJ.
Ans:The average molar bond enthalpy of the carbon-bromine bond in a molecule is 283.725kJ.
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calculate the average molar bond enthalpy of the carbon-bromine bond in a CBr4 molecule....
Given that ΔΙ, [Br(g)]-111.9 kJ-mol-1 dH,[dg)]-716.7 kJ-mol-1 ΔΗǐ[CBr,(e)]-29.4 kJ-mol-1 calculate the average molar bond enthalpy of...
Given that ΔΙ, [Br(g)]-111.9 kJ-mol-1 dH,[dg)]-716.7 kJ-mol-1 ΔΗǐ[CBr,(e)]-29.4 kJ-mol-1 calculate the average molar bond enthalpy of the carbon-bromine bond in a CBr4 molecule. Number : mol
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