int of alkanes increases with increasing number of carbon. Explain why this is t
ID: 1076425 • Letter: I
Question
int of alkanes increases with increasing number of carbon. Explain why this is true Draw the structural formula of cyclohexane and hexane. How does the molecular formula of a cyclohexane differ from that of hexane? Explain the reason behind the difference. 3) 4) Poly-halogenated hydrocarbons are used as local and general anesthetic. Explain how these chemicals behave as anesthetic. 5) You are given two beakers, each of which contains a white crystalline solid. Both are soluble in water. How would you determine which of the two solids is an ionic compound and which is a covalent compound? 6) Why is it necessary to have sufficient air flow into the operating furnace during winter.Explanation / Answer
2)The molecules in an alkane are attracted towards each other by weak dispersion forces.These dispersion forces exist due to unequal charge distribution in molecules,caused by the different orientations/movements of the molecule in space,(a phenomena that takes place temporarily.)
Thus,an alkane with more number of carbons have stronger dispersion forces acting between the molecules,so that they require more energy to escape the surface of the alkane .As more energy is needed to break the molecules apart ,so higher is the boiling points of the alkanes with more carbons.
It needs to be mentioned that at the boilng point the molecules escapes the surface of the liquid to become vapors.
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