To explain:
The differences in boiling points of heptanes and pentane.
Introduction:
The point where substance starts boiling and turns into vapor is called boiling point.
Pentane is an
Heptane is a straight chain alkane. Its chemical formula is
Boiling point of pentane is
The molecules that have strong bond with each other through intermolecular forces like hydrogen bond, weak London forces, covalent bonding do not achieve the kinetic energy, which is required to escape the liquid state. Hence molecules with strong intermolecular forces have higher boiling point.
Want to see the full answer?
Check out a sample textbook solutionChapter 7 Solutions
General, Organic, and Biological Chemistry (3rd Edition)
- Consider the structures of salicylic acid and acetylsalicylic acid. What structural features are most likely responsible for the difference in the melting points of the two molecules? Explain briefly.arrow_forwardYou have samples of four compounds: dimethyl ether, methane, difluoromethane, and ethanol. You measure the boiling points of the compounds as -128 °C, -52 °C, -25 °C, and 78 °C, but then lose the labels for each sample. Make the following predictions Which compound boils at -128 °C?arrow_forwardWhich one of the following compounds has highest boiling point? HO || НО ОН IV НОarrow_forward
- A sample petrol gave 85% of carbon and 15% of hydrogen gas. Calculate the weigth of air required for complete combustion of 1kg of petrol.arrow_forward1. Given the molar mass is 78.0 g/mol, what is the molecular formula of the hydrocarbon? 2. If atmospheric pressure is 0.985 atm and the water vapor is 17.5 mm Hg, what is the pressure of the gas collected over the water?arrow_forwardWrite a balanced chemical equation for the reaction of ethene with oxygen. O a. C2H4(g) + 302(g) → 2CO2(g) + 2H2O(g) O b. 2C2H2(g) + 502(g) → 4CO2(g) + 2H2O(g) O c. CH4(g) + 2O2(g) → CO2(g) + 2H2O(g) O d. C2H4(g) + 202(g) → 2CO2(g) + 2H2(g) O e. 2C2H6(g) + 702(g) →> 4CO2(g) + 6H2O(g)arrow_forward
- Arrange the following compounds in decreasing order of boiling point. Highest Boiling Point 1 Ethanoic acid (carboxylic acid) 2 Ethanamide (amide) 3 propan-1-ol (alcohol) 4 n-butane (alkane) Lowest Boiling Pointarrow_forwardRank the following compound in terms of increasing predicted boiling points. Explain your answer. Compounds: hydrocarbon, phenol, dichlorobenzene,arrow_forwardArrange the following compounds in order of boiling point, from lowest to highest (based on intermolecular forces): C₂H6, CH4, C8H18, C4H10 Lowest boiling point → < ♦ < ♦ ◄► V Highest boiling pointarrow_forward
- Which of the following compounds would have the highest boiling point? CH3CH,CH2OH CH3CH,CH3 O CH;CH,CH,CH3 O CH3CH,OHarrow_forwardWhich of the following has the lowest boiling point? O Diethyl ether O Acetone O Acetic acid O methyl formate O thanolarrow_forwardWhich of the compounds, ethanol, C2H6O, or methanol, CH3OH, should have the higher boiling point? Why? How would the boiling point change if the atmospheric pressure increased or decreased? What is the effect of small amount of impurity on the boiling point of an organic compound? List five physical properties of organic compounds that are often measured by organic chemists.arrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningChemistry: Matter and ChangeChemistryISBN:9780078746376Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl WistromPublisher:Glencoe/McGraw-Hill School Pub Co