Question

difference between bending and stretching​

Answer 1

Answer:

The absorption of IR radiation causes bonds to stretch and bend. Stretches correspond to the increasing and decreasing of the bondlenghs within a molecule. Bends correspond to the increasing and decreasing of the angle between bonds in a molecule. The animations below show the possible vibrations of the H2O molecule.

Answer 2

Answer:

Bending vibrations change bond angles. A stretching vibration changes the bond length. In symmetric stretching, two or more bonds vibrate in and out together.