A one-dimensional particle-in-a-box may be used to illustrate the import kinetic energy quantization in covalent bond formation.
For example, the electronic energy change associated with the reaction H+H H2 may be modeled by treating each reactant H atom as an electron in a one-dimensional box of length LH 5a0 (the 99% electron density diameter of hydrogen), and treating he diatomic H2 as a one-dimensional box of length LH2 RB+5ao (where ao is the Bohr radius of hydrogen and Re 0.74 Å is the experimental bond length of H2). (a) Use the above particle-in-a-box model to model ance of predict the bond formation energy of H2, and compare your result with the experi- mental value of -436 kJ/mol. (b) What interactions have been neglected in the above calculation and what does your result imply with regard to the importance of kinetic energy quantization in covalent bond formation?
1 answer:
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Answer:
B
Explanation:
Torque exerted on an object depends upon three things.
1. Moment arm
2. Magnitude of applied force
3. Direction of force
T=r x F
T= r * F sinФ
Let T1 is force due to force applied at mid point of door.
let d is the width of door, so
T1= °) (∴ moment arm =d)
T1= __________(2) (∴ sin 90°=1)
Let T2 is the torque due to force applied at the doorknob.
T2= (∴ moment arm =d)
T2= __________(2) (∴ sin 90°=1)
From equation (1) and equation (2)
2T1=T2
or
T1= T2/2
As T2 is greater so option B is the correct answer.