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| Questão | Responda |
| What does an infrared spectrometer produce? | A spectrum that shows you what frequencies of radiation the bonds in a molecule are absorbing so you can use it to identify the functional groups in the molecule |
| How does infrared spectroscopy work? | A beam of IR radiation is passed through a sample of a chemical. The IR radiation is absorbed by the covalent bonds in the molecules, increasing their vibrational energy. Bonds between different atoms absorb different frequencies of IR radiation |
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Describe the infrared spectrum for this molecule:
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| Name two applications of IR spectroscopy | Breathalysers Monitoring pollutants |
| How do breathalysers work? | The amount of ethanol vapour in the driver's breath is found by measuring the intensity of the peak corresponding to the C-H bond in the IR spectrum |
| In breathalysers, why is the C-H bond chosen as opposed to the O-H bond? | The C-H bond is not affected by the water vapour in the breath |
| How is infrared spectroscopy used to monitor the concentrations of polluting gases? | Polluting gases include carbon monoxide and nitrogen monoxide (both present in car emissions). The intensity of the peaks corresponds to the C≡C or N≡O bonds can be studied to monitor their levels |
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