(a)
Interpretation: The types of intermolecular forces present in acetic acid and sodium acetate are to be stated.
Concept introduction: According to Bronsted-Lowry theory, when an acid donates a proton the species formed is known as conjugate base and when the base accepts a proton the species formed is known as conjugate acid.
The intermolecular forces are the forces that exist in between the two or more atoms in a compound. Due to strong intermolecular forces, the molecule will require more energy to break the bonds.
(b)
Interpretation: An explanation corresponding to the fact that the melting point of sodium acetate is higher than the melting point of acetic acid is to be stated.
Concept introduction: The melting point of compounds depends upon the molecular weight and the intermolecular forces present in the compounds. The intermolecular forces are the forces that exist in between the two or more atoms in a compound. Due to strong intermolecular forces, the molecule will require more energy to break the bonds. The compounds that have ionic bonding and hydrogen bonding will possess higher melting point.
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Organic Chemistry
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- Would you expect butanone, CH;COCH;CH3 where the CO is a double bond, to have a higher or lower boiling point than acetone? Explain your reasoning. Propanol, CH3CH2CH2OH, has a molar mass of 60.1 g/mol and a boiling point of 97.4°C. Use intermolecular forces to explain why propanol has a higher boiling point than butane or acetone.arrow_forward(a) (b) (c) Br Br Nal acetone NaCN NaSCH 3arrow_forwardWhich of the following statements about the reaction H2(g)+O2(g)→H2O(l)H2(g)+O2(g)→H2O(l) is true? (i) This is an example of an acid–base reaction. (ii) O2O2 is oxidized in this reaction. (iii) H2H2 is reduced in this reaction. Which of the following statements about the reaction is true? (i) This is an example of an acid–base reaction. (ii) is oxidized in this reaction. (iii) is reduced in this reaction. iii only i only ii and iii ii only None of them are true.arrow_forward
- 85. Propane, C3H8, is a hydrocarbon that is commonly used as a fuel. (a) Write a balanced equation for the complete combustion of propane gas. (b) Calculate the volume of air at 25 °C and 1.00 atmosphere that is needed to completely combust 25.0 grams of propane. Assume that air is 21.0 percent O2 by volume. (Hint: We will see how to do this calculation in a later chapter on gases—for now use the information that 1.00 L of air at 25 °C and 1.00 atm contains 0.275 g of O2 per liter.) (c) The heat of combustion of propane is −2,219.2 kJ/mol. Calculate the heat of formation, ΔH∘fΔHf° of propane given that ΔH∘fΔHf° of H2O(l) = −285.8 kJ/mol and ΔH∘fΔHf° of CO2(g) = −393.5 kJ/mol. (d) Assuming that all of the heat released in burning 25.0 grams of propane is transferred to 4.00 kilograms of water, calculate the increase in temperature of the water.arrow_forwardConsider 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_forwardConsider the data in the table. Compound Melting point (°C) ????? (??/???)ΔHfus (kJ/mol) Boiling point (°C) ????? (??/???)ΔHvap (kJ/mol) HFHF −83.11 4.577 19.54 25.18 HClHCl −114.3 1.991 −84.9 17.53 HBrHBr −86.96 2.406 −67.0 19.27 HIHI −50.91 2.871 −35.38 21.16 Using the data in the table, calculate Δ?fus and Δ?vap for HF. Δ?fus= J/(K⋅mol) Δ?vap= J/(K⋅mol) Determine the entropy change when 8.70 mol HF(g) condenses at atmospheric pressure. Δ?= J/Karrow_forward
- Consider the data in the table. Compound Melting point (°C) ????? (??/???)ΔHfus (kJ/mol) Boiling point (°C) ????? (??/???)ΔHvap (kJ/mol) HFHF −83.11 4.577 19.54 25.18 HClHCl −114.3 1.991 −84.9 17.53 HBrHBr −86.96 2.406 −67.0 19.27 HIHI −50.91 2.871 −35.38 21.16 Using the data in the table, calculate Δ?fusΔSfus and Δ?vapΔSvap for HF.HF. Δ?fus=ΔSfus= J/(K⋅mol)J/(K⋅mol) Δ?vap=ΔSvap= J/(K⋅mol)J/(K⋅mol) Determine the entropy change when 7.60 mol HF(l)7.60 mol HF(l) boils at atmospheric pressure. Δ?=ΔS= J/Karrow_forwardIdentify the correct dipole for the C-O bond in the Lewis structure of acetone shown using the symbols δ⁺ and δ⁻. A (δ⁺)C – O(δ⁺) B (δ⁻)C – O(δ⁺) C (δ⁻)C – O(δ⁻) D (δ⁺)C – O(δ⁻)arrow_forwardAlcohols A, B, and C all have the composition C4H10O. Molecules of alcohol A contain a branched carbon chain and can be oxidized to an aldehyde; molecules of alcohol B contain a linear carbon chain and can be oxidizedto a ketone; and molecules of alcohol C can be oxidized to neither an aldehyde nor a ketone. Write the Lewis structures of these molecules.arrow_forward
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