Section 2.9 introduced the idea of structural isomerism, with 1-propanol and 2-propanol as examples. Determine which of these properties would distinguish these two substances: (a) boiling point, (b) combustion analysis results, (c) molecular weight, (d) density at a given temperature and pressure. You can check on the properties of these two compounds in Wolfram Alpha (http://www.wolframalpha.com/) or the CRC Handbook of Chemistry and Physics.

Video transcript

Hey everyone in this example we're told that structural isomerization occurs when the atoms that form a molecule have different connectivity ease with one another. Which of the following properties are expected to be different for one Roma, butane and two bromo butane. So we're given the properties below A through D. And it's told in the prompt that we can find the physical properties of these two substances in the CRC handbook of chemistry and physics. So what we should recall is that customers our compounds with the same chemical formula and have different molecular structures so we can say but different molecular structures we should recall that physical properties are dependent on our molecular structures of our molecules. So based on our given properties, we would agree that the chemical formula is not a physical property. So we can rule out choice A however be boiling point is definitely a physical property. Viscosity, which measures the flow of a liquid is also a physical property and vapor pressure, which is a measure of the vapor or the pressure exerted by vapor that is in equilibrium with its liquid state is also going to be a physical property. And so because we confirm that choice is B, C and D. Are all physical properties and because we know that customers have different molecular structures and molecular structures are, what physical properties depend upon. We can confirm that choices be C&D. Are all the correct choices as properties expected to be different for the summers one bromo butane and to attain so B. C and D. Are final answers for this example. If you have any questions, please leave them down below. Otherwise, I'll see everyone in the next practice video.