The correct reason and explanation should be given for the following question, How would the energy required to cause IR- absorbing vibrations in C O 2 change if the carbon and oxygen atoms were connected by single rather than double bonds. Concept introduction: Greenhouse gases are one type of gas which traps the heat within the system and thus it increases the overall temperature of the earth resulting global warming . Examples: C O 2 , C H 4 .. Greenhouse effect: The heat near the earth surface gets trapped by the gases present in the earth atmosphere. The carbon dioxide is the primary gas that traps more heat. Trapping of IR radiation constitutes the greenhouse effect. IR Spectroscopy: The bonds between atoms in the molecule stretch and bend, absorbing IR energy and creating the IR spectrum. Asymmetrical stretching or bending and internal rotations changes the dipole moment of a molecule. Asymmetrical stretching and bending is IR active. Symmetrical stretching and bending does not change the dipole moment of a molecule and so it is not IR active. Vibrations in a Non-linear triatomic ( E x a m p l e : H 2 O , C O 2 ... ) molecule is shown below,

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Chapter 3, Problem 37Q

Interpretation Introduction

Interpretation:

The correct reason and explanation should be given for the following question,

How would the energy required to cause IR- absorbing vibrations in CO2 change if the carbon and oxygen atoms were connected by single rather than double bonds.

Concept introduction:

Greenhouse gases are one type of gas which traps the heat within the system and thus it increases the overall temperature of the earth resulting global warming.

Examples: CO2,CH4..

Greenhouse effect: The heat near the earth surface gets trapped by the gases present in the earth atmosphere. The carbon dioxide is the primary gas that traps more heat.

Trapping of IR radiation constitutes the greenhouse effect.

IR Spectroscopy: The bonds between atoms in the molecule stretch and bend, absorbing IR energy and creating the IR spectrum.

Asymmetrical stretching or bending and internal rotations changes the dipole moment of a molecule. Asymmetrical stretching and bending is IR active. Symmetrical stretching and bending does not change the dipole moment of a molecule and so it is not IR active.
Vibrations in a Non-linear triatomic (Example : H2O , CO2 ...) molecule is shown below,

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