Bond Strength and Force constant

In summary, the conversation discusses a problem involving the total energy and bond energy of a system, as well as the spring constant. The solution involves taking derivatives and solving equations to find values for B and R0. Hints are given for parts (b) and (c) to help with solving the problem. There is also mention of a potential issue with the energy expression leading to a negative value for B.
  • #1
Muthumanimaran
81
2

Homework Statement


3.png


Homework Equations

The Attempt at a Solution


(a) Total energy is
$$E=\frac{-e^2}{4\pi\epsilon_{0}R}-\frac{B}{R^{5/6}}$$

Taking derivative of E with respect to R and equating it to zero when R=R0 yields,
i.e,
$$\frac{dE}{dR}{\bigg|}_{R=R_0}=0$$
when R=R0
yields,
$$B=\frac{3e^2}{10\pi\epsilon_{0}{R_{0}}^{1/6}}$$

How to proceed with part (b) and part (c)? giving me hints to solve this problem is highly helpful.
 

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  • #2
There seems to be a problem with the signs. Doesn't your energy expression lead to a negative value for B?
 
  • #3
You haven't finished part a yet. The question asks you to calculate a value.
For b and c, What is the definition of bond energy? What is the definition of spring constant? If you don't know equations for finding these, can you work them out by thinking logically about the situation?
 

1. What is bond strength?

Bond strength refers to the amount of energy required to break a chemical bond between two atoms.

2. How is bond strength measured?

Bond strength is typically measured in units of kilojoules per mole (kJ/mol). This is the amount of energy required to break one mole of a specific chemical bond.

3. What factors affect bond strength?

The bond strength between two atoms is affected by several factors, including the types of atoms involved, their electronegativity difference, and the distance between them.

4. What is force constant?

Force constant, also known as bond strength constant, is a measure of the stiffness of a chemical bond. It is related to the strength of the bond and the distance between the atoms.

5. How does force constant affect bond strength?

A higher force constant indicates a stiffer bond, making it more difficult to break. Therefore, a higher force constant usually corresponds to a higher bond strength.

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