30 10 Propane is used as a fuel for portable outdoor grills, and often butane li

Question

30 10 Propane is used as a fuel for portable outdoor grills, and often butane lighters are used to light campfires in the summertime. To the right is a vapor pressure curve for propane (C3Hg), butane (C4H10), and isobutane (C4H10). Please use these curves to answer the following questions. 25 15 butan 200 225 250 275 300 325 350 Temperature (K) 225 300 Temperature (K) 3.Which of the following best represents the potential energies of propane (P), butane (B), and isobutane (I) at any given temperature? P B I P BI P B I P B I

Explanation / Answer

3. Ans is 'D'

Propane (C3H8) butane (C4H10) isobutane (C4H10)

As butane and isobutane contains more bonds than propane , more energy is released as compare to propane when we break the bond . Now isobutane has a branched structure hence its energy is low as compare to butane.

Also temperature of butane is highest so its potential energy is maximum.

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