Organic Chemistry Chapter 15/16/17 Flashcards
Compound G (chlorofluorocarbons) was once used as a propellant in aerosols. It has been linked with depletion of the ozone layer in the stratosphere. State 2 properties that made compound G suitable for use as an aerosol.
It has a low boiling point
It is not flammable
What happens to molecules when infrared radiation is absorbed
Bond Vibrates
Why do boiling points of the halogens increase down the group
There is an increase in the strength of instantaneous dipoles
The depletion of ozone is catalysed by chlorine radicals.
What halpens at termination step
Number of radicals decrease
Enthalpy change is negative
Nitrogen monoxide reacts instantaneously in air to form NO2.
Why is this
The activation enthalpy for the reaction is lowe
What is the shortest and longest wavelength
Shortest is gamma rays
Longest is radiowaves
What does the ozone do in the stratosphere
Ozone acts as a sunscreen in the stratosphere
What happens to carboxylic acids when reacting with tertiary alcohols
They form esters
Iodopropane has a higher boiling point than chloropropane.
Why is this?
It has a stronger instantaneous dipole-induxe dipole bonds than chloropropane.
What does UV radiation do?
Promotes electrons to higher energy levels in molecules
What is the colour change for acidified dichromate when reduced
Orange to green
