FC23: Spectroscopy Flashcards
Describe the process of I.R. spectroscopy
Sample of covalent substance absorbs some wavelengths of I.R.
The transmitted I.R. is detected by an I.R. detector which sends a signal to a computer, which interprets this signal and plots a graph
Explain what happens to a molecule when it absorbs I.R.
It vibrates and its covalent bonds bend
What is the relationship between wavelength and wavenumber
inverse wavelength = wavenumber
What are 2 uses of I.R. spectrometry
1 - I.R. breathalyser
2 - Monitoring air pollution
what does m/z stand for in mass spectrometry
mass / charge
what is the molecular ion peak
the most prominent peak that has the highest m/z value - this is the Mr of the molecule
Why does the m+1 (satellite peak) appear
it is due to the 13C isotope as molecular ions contain a 13C atom instead of 12C
Give two specific examples that caused a rise in CO2 levels
An increase in burning fossil fuels from industrialisation and mechanised transport
Name the 2 international agreements that set targets to reduce CO2 emissions
The Kyoto Protocol (1998)
and
The Paris Agreement (2015(
