Homework Answers
Ans :
Entropy is the degree of randomness or disorderness of the system . For the molecules with similar physical states , molar masses and equal number of atoms , the entropy trend can be predicted by their vibrational modes.
So here , the molecule having greater molar entropy are :
a) CO2 : this is because CO2 has two stretch modes whereas CO has only 1.
b) Propane : Propane has two torsional modes. These modes are absent in cyclopropane.
c) pentane : The torsional modes in both the molecules are similar. But the presence of four bulky groups in neopentane make it sterically hindered , so pentane has greater entropy than neopentane.
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2. In each case below, predict which molecule of the pair has the greater molar entropy...
In each case, which molecule of the pair has the greatest molar entropy under the same...
In each case, which molecule of the pair has the greatest molar entropy under the same conditions (assume gaseous species). You may need to look up the molecular structure for some of these compounds. (a) water / heavy water (b) ethanol epoxyethane (ethylene oxide) (c) butylamine / pyrrolidine (d) pentane 1,2-dimethylpropane (neopentane)
& For each pair of species, predict which is the stronger base? NH (6) & Rank...
& For each pair of species, predict which is the stronger base? NH (6) & Rank the following from most stable to least stable. CH ON CH₂CH CH₂CH2
Which of the substances below will have the greatest standard molar entropy? C4H10(g) C4H10(l) Xe(g) Which...
Which of the substances below will have the greatest standard molar entropy? C4H10(g) C4H10(l) Xe(g) Which of the substances below will have the greatest standard molar entropy? C4H10(g) C4H10(l) Xe(g) C4H10(g), because it is a gas and as such has translational, rotational, and vibrational modes, allowing for greater energy dispersal C4H10(l), because it is a liquid, so the molecules are in close contact with one another, making the dispersal of energy more efficient Xe, because it has the greatest molar...
Part A Which substance in each of the following pairs would you expect to have the...
Part A Which substance in each of the following pairs would you expect to have the higher standard molar entropy? Explain. Match the items in the left column to the appropriate blanks in the sentences on the right. Reset Help liquids have more randomness than gases Of CO2(g) and CO(g), has the higher standard molar entropy because CH3OH(1) of Iz(s) and I2(g) C2H6(8) has the higher standard molar entropy because CH, OH(g) I_(g) Of CH3OH(g) and CH3OH(1), has the higher...
a short answer is fine for each Predict which of the following complexes in each pair...
a short answer is fine for each
Predict which of the following complexes in each pair will produce the greater splitting of the d orbitals. Explain your choice in each case. [V(H_2 O)_6]^2+ or [V(H_2 O)_6]^3+ [Cr(CN)_6]^3- or [Cr(NH_3)_6]^3+ [Rh(CN)_6]^3- or (Co(CN)_6)^3- [TiF_6]^3+ or (Ti(H_2 O)_6]^3+ [Co(NH_3)_5F]^2+ or [Co(NH_3)_5Br]^2+ [Fe(NH_3)_6]^3+ or [Fe(NMe_3)_6]^3+ cis-[Pd(NH_3)_2CI_2] or cis-[Pt(NH_3)_2CI_2] [Fe(en)_3]^3+ or [Co(en)_3]^3+, where en = 1, 2-ethylenediamine [CoCl_4]^1- or [Co(CN)_6]^3-
b) CI d) He 2. Predict which of the following compounds are ionic and which are covalent, based on the location of...
b) CI d) He 2. Predict which of the following compounds are ionic and which are covalent, based on the location of their constituent atoms in the periodic table: (a) C1,CO (b) Mno (c) NCI, (d) CoBr (e) CaF (2) HI 3. Identify the more polar bond in each of the following pairs of bonds: (a) HF or HCI (b) NO or CO (C) SH or OH (d) PCI or SCI (e) CH or NH (1) SO or PO What...
For each pair of species, predict which is the stronger base? 5. Он or 2. or HH 1. NH NH (b) 6. Rank the following...
For each pair of species, predict which is the stronger base? 5. Он or 2. or HH 1. NH NH (b) 6. Rank the following from most stable to least stable. 4. 1. 2. 3. Н-с H H Н.с H -H H CH3 CH,сн, CH,сH CH,CH H 7. Which cation would be the most stable? А. В. C. D. What is the order of increasing contribution to the resonance hybrid? 8. CF3 Lnkentn CF3 CF3 Ш II I
1. For each pair, circle the molecule with the lower pK and provide a brief explanation...
1. For each pair, circle the molecule with the lower pK and provide a brief explanation for your choice. wale wabon ---- 2. For each molecule, draw the two possible chair conformers and circle the preferred conformer. a) cis-1,3-dimethylcyclohexane trans-1,4-dimethylcyclohexane 3. Draw all distinct isomers of dimethylcyclopropane and show the relationship as enantiomer, diastereomer or meso. 4. In each of the following pairs of compounds one is chiral and the other achiral, Circle the chiral compound in each. a) CH,CHCH=CH...
For each pair of species, predict which is the stronger base? 5. Он or 1. 2. or В в NH NH (a) (b) 6. Rank the follo...
For each pair of species, predict which is the stronger base? 5. Он or 1. 2. or В в NH NH (a) (b) 6. Rank the following from most stable to least stable. 2. 3. 4. Нас Н-с O H -н CH H CH,сH, сн,сн CH,CH 7. Which cation would be the most stable? А. В. C. D. What is the order of increasing contribution to the resonance hybrid? 8. CF3 ÇF3 CF3 I II III
Which member of each pair has the greater polarizability (forming stronger dispersion forces)? Briefly explain your...
Which member of each pair has the greater polarizability (forming stronger dispersion forces)? Briefly explain your reasoning. a. CH 2 or butane b. Mg or Mg? c. XeCla or XeF
In each case, which molecule of the pair has the greatest molar entropy under the same conditions (assume gaseous species). You may need to look up the molecular structure for some of these compounds. (a) water / heavy water (b) ethanol epoxyethane (ethylene oxide) (c) butylamine / pyrrolidine (d) pentane 1,2-dimethylpropane (neopentane)
& For each pair of species, predict which is the stronger base? NH (6) & Rank the following from most stable to least stable. CH ON CH₂CH CH₂CH2
Part A Which substance in each of the following pairs would you expect to have the higher standard molar entropy? Explain. Match the items in the left column to the appropriate blanks in the sentences on the right. Reset Help liquids have more randomness than gases Of CO2(g) and CO(g), has the higher standard molar entropy because CH3OH(1) of Iz(s) and I2(g) C2H6(8) has the higher standard molar entropy because CH, OH(g) I_(g) Of CH3OH(g) and CH3OH(1), has the higher...
a short answer is fine for each
Predict which of the following complexes in each pair will produce the greater splitting of the d orbitals. Explain your choice in each case. [V(H_2 O)_6]^2+ or [V(H_2 O)_6]^3+ [Cr(CN)_6]^3- or [Cr(NH_3)_6]^3+ [Rh(CN)_6]^3- or (Co(CN)_6)^3- [TiF_6]^3+ or (Ti(H_2 O)_6]^3+ [Co(NH_3)_5F]^2+ or [Co(NH_3)_5Br]^2+ [Fe(NH_3)_6]^3+ or [Fe(NMe_3)_6]^3+ cis-[Pd(NH_3)_2CI_2] or cis-[Pt(NH_3)_2CI_2] [Fe(en)_3]^3+ or [Co(en)_3]^3+, where en = 1, 2-ethylenediamine [CoCl_4]^1- or [Co(CN)_6]^3-
b) CI d) He 2. Predict which of the following compounds are ionic and which are covalent, based on the location of their constituent atoms in the periodic table: (a) C1,CO (b) Mno (c) NCI, (d) CoBr (e) CaF (2) HI 3. Identify the more polar bond in each of the following pairs of bonds: (a) HF or HCI (b) NO or CO (C) SH or OH (d) PCI or SCI (e) CH or NH (1) SO or PO What...
For each pair of species, predict which is the stronger base? 5. Он or 2. or HH 1. NH NH (b) 6. Rank the following from most stable to least stable. 4. 1. 2. 3. Н-с H H Н.с H -H H CH3 CH,сн, CH,сH CH,CH H 7. Which cation would be the most stable? А. В. C. D. What is the order of increasing contribution to the resonance hybrid? 8. CF3 Lnkentn CF3 CF3 Ш II I
1. For each pair, circle the molecule with the lower pK and provide a brief explanation for your choice. wale wabon ---- 2. For each molecule, draw the two possible chair conformers and circle the preferred conformer. a) cis-1,3-dimethylcyclohexane trans-1,4-dimethylcyclohexane 3. Draw all distinct isomers of dimethylcyclopropane and show the relationship as enantiomer, diastereomer or meso. 4. In each of the following pairs of compounds one is chiral and the other achiral, Circle the chiral compound in each. a) CH,CHCH=CH...
For each pair of species, predict which is the stronger base? 5. Он or 1. 2. or В в NH NH (a) (b) 6. Rank the following from most stable to least stable. 2. 3. 4. Нас Н-с O H -н CH H CH,сH, сн,сн CH,CH 7. Which cation would be the most stable? А. В. C. D. What is the order of increasing contribution to the resonance hybrid? 8. CF3 ÇF3 CF3 I II III
Which member of each pair has the greater polarizability (forming stronger dispersion forces)? Briefly explain your reasoning. a. CH 2 or butane b. Mg or Mg? c. XeCla or XeF
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