Homework Answers
a) 1-Methylcyclopropene” has two sp2- hybridized carbons in a
three-membered ring which causes more angular strain as compared to
angular strain caused by only one sp2- hybridized carbons in a
three-membered ring of “Methylenecyclopropane"
Hence, 1-Methylcyclopropene has more angle strain than
methylenecyclopropane which results in lower stability of
1-methylcycloprene than methylenecyclopropane.
b) 1-methylcycloprene is more stbale than 3-methyl cyclopropene becuause the electronegative sp2 hybridized carbon atom in the former is attached to - CH3 group which due to its +I effect will donate its electron density to sp2 carbon thus making it more stable than the later.
Where as 3-methyl cyclopropene is less stable than methylenecyclopropane because of higher angular strain in the former.
Add Answer to:
Suggest an explanation for the fact that 1-methylcyclopropene is some 42 kJ/mol (10 kcal/mol) less stable...
Semi-empirical calculations indicate that for cis-1,4-di-tert-butylcyclohexane, a twist boat conformation is approximately 1 kcal/mol (4.2 kJ/mol)...
Semi-empirical calculations indicate that for cis-1,4-di-tert-butylcyclohexane, a twist boat conformation is approximately 1 kcal/mol (4.2 kJ/mol) more stable than the chair conformation. Propose an explanation.
The standard free energy of activation of a reaction A is 71.6 kJ mol–1 (17.1 kcal...
The standard free energy of activation of a reaction A is 71.6 kJ mol–1 (17.1 kcal mol–1) at 298 K. Reaction B is one million times faster than reaction A at the same temperature. The products of each reaction are 10.0 kJ mol–1 (2.39 kcal mol–1) more stable than the reactants. (a) What is the standard free energy of activation of reaction B?
The standard free energy of activation of a reaction A is 77.3 kJ mol–1 (18.5 kcal...
The standard free energy of activation of a reaction A is 77.3
kJ mol–1 (18.5 kcal mol–1) at 298 K. Reaction B is ten million
times faster than reaction A at the same temperature. The products
of each reaction are 10.0 kJ mol–1 (2.39 kcal mol–1) more stable
than the reactants. (a) What is the standard free energy of
activation of reaction B?
The anti conformation of 1, 2-dichloroethane, Cl-CH_2-CH_2- Cl, is 4.81 kJ mol^-1 (1.15 kcal mol^-1) more...
The anti conformation of 1, 2-dichloroethane, Cl-CH_2-CH_2- Cl, is 4.81 kJ mol^-1 (1.15 kcal mol^-1) more stable than the gauche conformation. The two energy barriers (measured relative to the energy of the gauche conformation) for carbon-carbon bond rotation are 21.5 kJ mol^-1 (5.15 kcal mol^-1) and 38.9 kJ mol^-1(9.3 kcal mol^-1). Sketch a graph of potential energy versus dihedral angle about the carbon-carbon bond. Show the energy differences on your graph and label each minimum and maximum with the appropriate...
Problem 7.7 The melting of sold ice to give liquid water has AH-144 kcal/ mol(+602 kJ/mol...
Problem 7.7 The melting of sold ice to give liquid water has AH-144 kcal/ mol(+602 kJ/mol and AS -5.25 cal/mol.K) (220 J/(mol )) What is the value of AG for the melting process at the following temperatures? SC (265) Express your answer using two decimal places. 10 A4 OE? AG- kcal/mol kJ/mol Subm Beguest Answer Part B Is the melting spontaneous or nonspontaneous at -10° 283 K spontaneous nospontaneous in equilibrium Submit Neuts or nonpontaneous at 0273 )
The standard free energy of activation of one reaction A is 90.20 kJ mol–1 (21.56 kcal...
The standard free energy of activation of one reaction A is 90.20 kJ mol–1 (21.56 kcal mol–1). The standard free energy of activation of another reaction B is 76.70 kJ mol–1 (18.33 kcal mol–1). Assume a temperature of 298 K and 1 M concentration. 1. by what FACTOR is one reaction faster than the other? Which reaction is faster? A, B, or cannot be determined?
problem 8.1 The change of state from liquid H,Oto gaseous H.Ohas AH- +9.72 kcal/mol (+40.7 kJ/mol)...
problem 8.1
The change of state from liquid H,Oto gaseous H.Ohas AH- +9.72 kcal/mol (+40.7 kJ/mol) and AS +26.1 cal/mol K) [+109 J/(molK) Review Constants What are the values of AH (in kcal/mol and kJ/mol for the change from gaseous to liquid H,0? Enter your answers numerically separated by a comma. AH kcal/mol. kJ/mol Submit Request Answer Part C What are the values of AS (in cal/mol · K) and J/(mol-K)) for the change from gaseous to liquid H. Enter...
help with this worksheet please! 1. Determine the radical stability with 1 the most stable and...
help with this worksheet please!
1. Determine the radical stability with 1 the most stable and 4 the least stable 2. What is the major product of 2-methylpropane mono-chlorination? Cl2 light 3. Calclate AH for chlorination of methane (DHe for CHa-H is 440 kJ/mol; DH° for Cl-Cl is 243 kJ/mol; DH° for CH3-Cl is 432 kJ/mol; and DH° for H-Cl is 353 kJ/mol 4. Draw structure of the most stable radical formed by hydrogen radical abstraction from 3- methylcyclohexene 5....
The following table lists some enthalpy of formation values for selected substances. Substance ΔfH∘ΔfH∘ (kJ mol−1)(kJ...
The following table lists some enthalpy of formation values for selected substances. Substance ΔfH∘ΔfH∘ (kJ mol−1)(kJ mol−1) CO2(g)CO2(g) −393.5−393.5 Ca(OH)2(s)Ca(OH)2(s) −986.1−986.1 H2O(l)H2O(l) −285.8−285.8 CaCO3(s)CaCO3(s) −1207−1207 H2O(g)H2O(g) −241.8−241.8 Part A: Determine the enthalpy for this reaction: Ca(OH)2(s)+CO2(g)→CaCO3(s)+H2O(l) C a ( O H ) 2 ( s ) + C O 2 ( g ) → C a C O 3 ( s ) + H 2 O ( l ) Express your answer in kJ mol−1 k J m o l...
For a reaction with ΔH∘=−25 kcal/mol and ΔS∘=0.05 kcalmol−1K−1, calculate the equilibrium constant at: (1.) 30 ∘C and (2...
For a reaction with ΔH∘=−25 kcal/mol and ΔS∘=0.05 kcalmol−1K−1,
calculate the equilibrium constant at: (1.) 30 ∘C and (2.) 150
∘C.
Express your answers using two significant figures separated by
a comma.
Homework for Unit #4: Chapter 5 Problem 5.22 80115 Review | Constants Periodic Table Part A For a reaction with AH" = -25 kcal/10) and AS" = 0.05 kcal no 'K-,siculate the AG" at: (1.130 C and 2) 150C. Express your answers using two significant figures separated by...
The standard free energy of activation of a reaction A is 77.3
kJ mol–1 (18.5 kcal mol–1) at 298 K. Reaction B is ten million
times faster than reaction A at the same temperature. The products
of each reaction are 10.0 kJ mol–1 (2.39 kcal mol–1) more stable
than the reactants. (a) What is the standard free energy of
activation of reaction B?
The anti conformation of 1, 2-dichloroethane, Cl-CH_2-CH_2- Cl, is 4.81 kJ mol^-1 (1.15 kcal mol^-1) more stable than the gauche conformation. The two energy barriers (measured relative to the energy of the gauche conformation) for carbon-carbon bond rotation are 21.5 kJ mol^-1 (5.15 kcal mol^-1) and 38.9 kJ mol^-1(9.3 kcal mol^-1). Sketch a graph of potential energy versus dihedral angle about the carbon-carbon bond. Show the energy differences on your graph and label each minimum and maximum with the appropriate...
Problem 7.7 The melting of sold ice to give liquid water has AH-144 kcal/ mol(+602 kJ/mol and AS -5.25 cal/mol.K) (220 J/(mol )) What is the value of AG for the melting process at the following temperatures? SC (265) Express your answer using two decimal places. 10 A4 OE? AG- kcal/mol kJ/mol Subm Beguest Answer Part B Is the melting spontaneous or nonspontaneous at -10° 283 K spontaneous nospontaneous in equilibrium Submit Neuts or nonpontaneous at 0273 )
problem 8.1
The change of state from liquid H,Oto gaseous H.Ohas AH- +9.72 kcal/mol (+40.7 kJ/mol) and AS +26.1 cal/mol K) [+109 J/(molK) Review Constants What are the values of AH (in kcal/mol and kJ/mol for the change from gaseous to liquid H,0? Enter your answers numerically separated by a comma. AH kcal/mol. kJ/mol Submit Request Answer Part C What are the values of AS (in cal/mol · K) and J/(mol-K)) for the change from gaseous to liquid H. Enter...
help with this worksheet please!
1. Determine the radical stability with 1 the most stable and 4 the least stable 2. What is the major product of 2-methylpropane mono-chlorination? Cl2 light 3. Calclate AH for chlorination of methane (DHe for CHa-H is 440 kJ/mol; DH° for Cl-Cl is 243 kJ/mol; DH° for CH3-Cl is 432 kJ/mol; and DH° for H-Cl is 353 kJ/mol 4. Draw structure of the most stable radical formed by hydrogen radical abstraction from 3- methylcyclohexene 5....
For a reaction with ΔH∘=−25 kcal/mol and ΔS∘=0.05 kcalmol−1K−1,
calculate the equilibrium constant at: (1.) 30 ∘C and (2.) 150
∘C.
Express your answers using two significant figures separated by
a comma.
Homework for Unit #4: Chapter 5 Problem 5.22 80115 Review | Constants Periodic Table Part A For a reaction with AH" = -25 kcal/10) and AS" = 0.05 kcal no 'K-,siculate the AG" at: (1.130 C and 2) 150C. Express your answers using two significant figures separated by...
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