What is the approximate value of the ccc bond angle in
a. ch3ch2ch2oh
b. ch3c≡cch3
c. h2ccch2?

a)109° b)180° c)120°

Explanation:

Hi, in general the bond angle in any molecule depends of:

In particular for C atoms, there isn't free electron pairs so the angle only depends of the type of bond.

a) Propanol ( )

Is this molecule all C have single bonds and an hibridization of sp3, forming a tetrehedral geometry. The bond angle determined for this geometry is arround 109°

b)2-Butyne ( )

Is this molecule, the triple bond makes a sp hibridization, forming a linear geometry. The bond angle determined for this geometry is 180°

a) Propadiene ( )

Because of the double bonds, C have sp2 hibridization, forming a plain geometry. The bond angle determined for this geometry is 120°

the dissolution of polymer can be thermodynamically described in 2 steps.