Collisional Cross Section Solution

STEP 0: Pre-Calculation Summary
Formula Used
Collisional Cross Section = pi*((Radius of Molecule A*Radius of Molecule B)^2)
σAB = pi*((rA*rB)^2)
This formula uses 1 Constants, 3 Variables
Constants Used
pi - Archimedes' constant Value Taken As 3.14159265358979323846264338327950288
Variables Used
Collisional Cross Section - (Measured in Square Meter) - Collisional Cross Section is defined as the area around a particle in which the center of another particle must be in order for a collision to occur.
Radius of Molecule A - (Measured in Meter) - Radius of Molecule A is defined as one half the distance (d) between two nuclei in a diatomic molecule.
Radius of Molecule B - (Measured in Meter) - Radius of Molecule B is defined as one half the distance (d) between two nuclei in a diatomic molecule.
STEP 1: Convert Input(s) to Base Unit
Radius of Molecule A: 10.9 Meter --> 10.9 Meter No Conversion Required
Radius of Molecule B: 10.91 Meter --> 10.91 Meter No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
σAB = pi*((rA*rB)^2) --> pi*((10.9*10.91)^2)
Evaluating ... ...
σAB = 44427.5505562986
STEP 3: Convert Result to Output's Unit
44427.5505562986 Square Meter --> No Conversion Required
FINAL ANSWER
44427.5505562986 44427.55 Square Meter <-- Collisional Cross Section
(Calculation completed in 00.004 seconds)

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National University of Judicial Science (NUJS), Kolkata
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Molecular Reaction Dynamics Calculators

Number Density for A Molecules using Collision Rate Constant
​ LaTeX ​ Go Number Density for A Molecules = Collision Frequency/(Velocity of Beam Molecules*Number Density for B Molecules*Cross Sectional Area for Quantum)
Cross Sectional Area using Rate of Molecular Collisions
​ LaTeX ​ Go Cross Sectional Area for Quantum = Collision Frequency/(Velocity of Beam Molecules*Number Density for B Molecules*Number Density for A Molecules)
Number of Bimolecular Collision per Unit Time per Unit Volume
​ LaTeX ​ Go Collision Frequency = Number Density for A Molecules*Number Density for B Molecules*Velocity of Beam Molecules*Cross Sectional Area for Quantum
Vibrational Frequency given Boltzmann's Constant
​ LaTeX ​ Go Vibrational Frequency = ([BoltZ]*Temperature in terms of Molecular Dynamics)/[hP]

Collisional Cross Section Formula

​LaTeX ​Go
Collisional Cross Section = pi*((Radius of Molecule A*Radius of Molecule B)^2)
σAB = pi*((rA*rB)^2)

What is Collision Theory?

Collision theory states that when suitable particles of the reactant hit each other with correct orientation, only a certain amount of collisions result in a perceptible or notable change; these successful changes are called successful collisions. The successful collisions must have enough energy, also known as activation energy, at the moment of impact to break the pre-existing bonds and form all new bonds

How to Calculate Collisional Cross Section?

Collisional Cross Section calculator uses Collisional Cross Section = pi*((Radius of Molecule A*Radius of Molecule B)^2) to calculate the Collisional Cross Section, The Collisional Cross Section formula is defined as the area around a particle A in which the center of another particle B must be in order for a collision to occur in a reaction. Collisional Cross Section is denoted by σAB symbol.

How to calculate Collisional Cross Section using this online calculator? To use this online calculator for Collisional Cross Section, enter Radius of Molecule A (rA) & Radius of Molecule B (rB) and hit the calculate button. Here is how the Collisional Cross Section calculation can be explained with given input values -> 44427.55 = pi*((10.9*10.91)^2).

FAQ

What is Collisional Cross Section?
The Collisional Cross Section formula is defined as the area around a particle A in which the center of another particle B must be in order for a collision to occur in a reaction and is represented as σAB = pi*((rA*rB)^2) or Collisional Cross Section = pi*((Radius of Molecule A*Radius of Molecule B)^2). Radius of Molecule A is defined as one half the distance (d) between two nuclei in a diatomic molecule & Radius of Molecule B is defined as one half the distance (d) between two nuclei in a diatomic molecule.
How to calculate Collisional Cross Section?
The Collisional Cross Section formula is defined as the area around a particle A in which the center of another particle B must be in order for a collision to occur in a reaction is calculated using Collisional Cross Section = pi*((Radius of Molecule A*Radius of Molecule B)^2). To calculate Collisional Cross Section, you need Radius of Molecule A (rA) & Radius of Molecule B (rB). With our tool, you need to enter the respective value for Radius of Molecule A & Radius of Molecule B and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Collisional Cross Section?
In this formula, Collisional Cross Section uses Radius of Molecule A & Radius of Molecule B. We can use 1 other way(s) to calculate the same, which is/are as follows -
  • Collisional Cross Section = (Collision Frequency/Number Density for A Molecules*Number Density for B Molecules)*sqrt(pi*Reduced Mass of Reactants A and B/8*[BoltZ]*Temperature in terms of Molecular Dynamics)
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