Question

(A) How does a change in mass (for example, swapping a hydrogen with a deuterium) affect...

(A) How does a change in mass (for example, swapping a hydrogen with a deuterium) affect the frequency of a molecular vibration?

(B) How does a change in bonding strength (for example, comparing a C-C single-bond to a C-C double bond) affect the frequency of a molecular vibration?

Homework Answers

Answer #1

The frequency of vibration of a bond can be calculated using Hooks law

V = (1/pi.C)(sqrtK/mu)

V = frequency of vibration

C = velocity of light

K = force constant

Mu = reduced mass

From the equation, it is shown that frequency of vibration of a bond is directly proportional to force constant and inversely proportional to its reduced mass

1) if mass of the bonded atom increases, vibrational frequency decreases

Ex: C-H v = 3000 cm-1 and C-Cl, v = 650 cm-1

2) if force constant or bond strength increases, vibrational frequency increases

Ex: C-C, v = 1100 cm-1 and C=C, v = 1640cm-1

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1) How does the amplitude of vibration affect the time period of vibration for a spring-mass...
1) How does the amplitude of vibration affect the time period of vibration for a spring-mass system? a)The period decreases linearly as amplitude increases b)Time period increases as the square root of the amplitude c)No effect d)Time period increases linearly with the amplitude 2)What will be the value of the spring constant, if a mass of 1.1 kg attached to a spring stretches it by 16 cm. Ignore the mass of the spring and its original length. 3)What will be...
Which of the following can affect the affinity of an analyte for a particular phase? A....
Which of the following can affect the affinity of an analyte for a particular phase? A. volatility B. polarity C. hydrogen-bonding interactions D. all of these 3. Which of the following is a synonym for the term hydrophilic? A. hydrophobic B. lipophilic C. hypsochromic D. lipophobic 4. Which of the following can be used to manipulate a partition equilibrium? A. pH B. molecular mass C. boiling point D. DuckĀ® tape
1. When determining the molecular geometry of a molecule, which of the following needs to be...
1. When determining the molecular geometry of a molecule, which of the following needs to be considered? Choose all that apply A. Number of bonding domains on the central atom. B. Number of non-bonding electron pairs on the central atom. C. Number of core electrons on the central atom. D. Number of unpaired valence electrons in the central atom. 2. A central atom is found to have one double bond, one single bond, and one non-bonding pair of electrons. How...
How does organizational culture affect the change process?
How does organizational culture affect the change process?
a) If you were to double the mass of a mass/spring system, by how much would...
a) If you were to double the mass of a mass/spring system, by how much would you change the frequency? b) If you double the length of your pendulum, by what factor do you change the period? c) If you double the length of your pendulum, by what factor do you change the maximum acceleration?
What does polarizability mean? How do things like bond strength and bond length affect the polarizability?
What does polarizability mean? How do things like bond strength and bond length affect the polarizability?
62. An unknown sample with a total mass of 440.85 g contains carbon, hydrogen, and oxygen....
62. An unknown sample with a total mass of 440.85 g contains carbon, hydrogen, and oxygen. Show all work a. If the sample contains 300.25 g of carbon and 60.6 g of hydrogen, how much oxygen (in g) does the unknown sample contain? b. What is the empirical formula for the unknown compound? c. If the formula mass for the unknown is 88.17 g/mol, what is the molecular formula for the unknown compound?
Does centripetal acceleration affect (i.e. change) radial velocity? Explain. A good example of this would be...
Does centripetal acceleration affect (i.e. change) radial velocity? Explain. A good example of this would be a tetherball wrapping around a pole. The tension force developed within the string causes the ball to have an angular acceleration. Also, the string wrapping around the pole give rise to radial velocity of the ball. But does this angular acceleration change the radial velocity of the ball in any way? Please Explain.
Please Answer all In a single molecule of water, the hydrogen atoms and oxygen atom are...
Please Answer all In a single molecule of water, the hydrogen atoms and oxygen atom are held together by _______. A) ionic bonds B) covalent bonds C) hydrogen bonds D) none of these Linking monomers into polymers through covalent bonds is end results of ______. A) dehydration synthesis B) hydrolysis C) ionic bonding D) hydrogen bonding A bacterial cell that has flagella distributed over its entire surface is best described as ________________. A) peritrichous B) monotrichous C) lophotrichous D) amphitrichous...
How does a change in the concentration of Na+ in the ECF affect membrane potential? How...
How does a change in the concentration of Na+ in the ECF affect membrane potential? How does a change in the concentration of K+ in the ECF affect membrane potential? To which variable ([Na+]o or [K+]o) do you think membrane potential is more sensitive? Stated another way, do you think small changes in [Na+]o or [K+]o from their normal values would be more harmful to bodily function? What might those deleterious effects on the body be?