Science. Chemistry. Chemistry questions and answers. How much energy is absorbed when 129 g 2-propanol (structure shown) is vaporized at its normal boiling point of 82.3 °C? The AHap of 2-propanol is 39.9 kJ/mol at 82.3 °C and its structure is shown here. Η Η Η H-C-C-C-H || H:0: H н 2-Propanol 85.6 kJ 5,150 kJ 85.649 kJ/mol 5.15 x 10' 1. normal boiling points. In the present study, the liquid viscosity and interfacial ten-sion were determined simultaneously by surface light scattering (SLS) with aver-age expanded uncertainties of (1.7 and 0.9)% at or close to saturation conditions for temperatures between (273 and 403) K. Furthermore, capillary viscometry (CV) and Boiling points are approximately related to their molecular weight, the higher the molecular weight, the higher the boiling point. 2-Propanol(isopropanol) 82-83 . Water : 100 . t-Butyl alcohol : 83 . Cyclohexane : 80.7 . Methylene chloride : 39.8 . Bromoform : 146-150 . Fig. 3- Small Scale Boiling Point Apparatus Physical Data: density (20 °C): 0.786 g cm −3; melting point: −89 °C; boiling point: 82.6 °C; acidity (pK a): 16.5; refractive index: 1.3776. Solubility: widely soluble in many solvents, including water, ethyl acetate, ethanol, methyl-tert-butyl ether, chloroform, dichloromethane, toluene, benzene. Form Supplied in: colorless liquid. The systematic name for isopropyl alcohol, for example, is 2-propanol. CH 3 OH: Methanol : CH 3 CH 2 OH: Ethanol: CH 3 CHOHCH 3: 2-Propanol . As a result, alcohols have boiling points that are much higher than alkanes with similar molecular weights. The boiling point of ethanol, for example, is 78.5ºC, whereas propane, with about the same 2-Propanol Revision Date 24-December-2021 9. Physical and chemical properties Physical State Liquid Appearance Colorless Odor Alcohol-like Odor Threshold No information available pH 7 1% aq. sol Melting Point/Range-89.5 °C / -129.1 °F Boiling Point/Range 81 - 83 °C - / 177.8 181.4 °F @ 760 mmHg Flash Point 12 °C / 53.6 °F 2- propanol has greater boiling point, because hydrogen bonds between 2-propanol molecules, more energy is required to breake those bonds. Hydrogen bond is an electrostatic attraction between two polar groups that occurs when a hydrogen atom (H), covalently bound to a highly electronegative atom such as flourine (F), oxygen (O) and nitrogen (N The boiling point for proponal is approximately 50 degrees Celsius. Once again, higher than room temperature, so proponal is a liquid. We have just analyzed acetone. Our next boiling point is approximately 56 degrees, and for both proponal and for acetone, you have the dipole-dipole interaction between molecules. So we already covered acetone. 1-butanol will have the highest boiling point, followed by 2-methyl-2-propanol, butane, and 2-methylpropane.1-butanol and butane are linear molecules, See full answer below. Become a member and unlock all Study Answers Molecular Formula C3H8O Synonyms Isopropanol-2-d1 2-Propanol-2-d1 2-deuteriopropan-2-ol 3972-26-7 2-Propan-2-d-ol View More Molecular Weight 61.10 g/mol Computed by PubChem 2.1 (PubChem release 2021.05.07) Dates Create: 2007-02-07 Modify: 2023-11-25 1 Structures 1.1 2D Structure Structure Search Download Coordinates Chemical Structure Depiction n1w98ID.