Determine the heats of formation or the steric energies of the exo- and endo-anhydride adducts using...

Determine the heats of formation or the steric energies of the exo- and endo-anhydride adducts using a molecular mechanics program. What do these energies tell you about the mechanism of the reaction?

Expert Solution

queen_honey_blossom answered 1 year ago

Given the following heats of formation (ΔH°f, 25°C) and heats of combustion (ΔH°c, 25°C) data, determine...

Given the following heats of formation (ΔH°f, 25°C) and heats of combustion (ΔH°c, 25°C) data, determine the heat of reaction for the liquid-phase esterification of lactic acid (C3H6O3) with ethanol (C2H5OH) to form ethyl lactate (C5H10O3) and liquid water at 25°C and 1 atm. C3H6O3 + C2H5OH --> C5H10O3 + H2O (liquid) The table below shows the standard heat of combustion and heat of reaction. Compound ΔH°c (25°C, 1 atm) kJ/mol ΔH°f (25°C, 1 atm) kJ/mol C3H6O3 - -687.0 C2H5OH...

Using a molecular mechanics program, calculate the energy difference or the difference in heats of formation...

Using a molecular mechanics program, calculate the energy difference or the difference in heats of formation between Z- and E-stilbene. How do your computed values compare to the difference in heats of hydrogenation of the two isomers.

1. The heats of formation of CO2(g) and H2O(l) are -394 and -285.8 kJ/mole, respectively. Using...

1. The heats of formation of CO2(g) and H2O(l) are -394 and -285.8 kJ/mole, respectively. Using the data for the following combustion reaction, calculate the heat of formation of C3H4(g). C3H4(g) + 4 O2(g) -> 3 CO2(g) + 2 H2O(l) DHo = -1,939.1 kJ 2. A 10.0 gram sample of CaO is dissolved in water in a calorimeter whose specific heat capacity is 4.37 kJ/K. The temperature decreases 2.70 K. Calculate the DHo for the following reaction. CaO(s) +...

Draw Lewis structure, count the steric number and lone pair electrons. Using the steric number and...

Draw Lewis structure, count the steric number and lone pair electrons. Using the steric number and lone pair electrons to predict the geometry of the following species: (a) SO2, (b) BeCl2, (c) SeCl4, (d) PCl5

a) Calculate the steric energy or heat of formation for one single bond isomer of trans-benzalacetone...

a) Calculate the steric energy or heat of formation for one single bond isomer of trans-benzalacetone using the usual energy minimization procedure. The result should be a planar molecule. (b) Then deliberately hold the dihedral angle defined by atoms 1, 2, 3, and 4 at 0°, 90°, and 180° and again calculate the energies of the molecule. What is the approximate barrier to rotation about the single bond?

Calculate the heats of combustion for the following reactions from the standard enthalpies of formation listed...

Calculate the heats of combustion for the following reactions from the standard enthalpies of formation listed in Appendix 2 from your book. a. C2H4(g)+3O2(g)>2CO2(g)+2H2O(l) b. 2H2S(g)+3O2(g)>2H2O(l)+2SO2(g)

Based on the standard free energies of formation, which of the following reactions represent a feasible...

Based on the standard free energies of formation, which of the following reactions represent a feasible way to synthesize the product? A. 2C(s)+H2(g)→C2H2(g); ΔG∘f=209.2 kJ/mol B. C(s)+O2(g)→CO2(g); ΔG∘f=−394.4 kJ/mol C. 2C(s)+2H2(g)→C2H4(g); ΔG∘f=68.20 kJ/mol D. 2CO(g)+O2(g)→2CO2(g); ΔG∘f=−788.0 kJ/mol

a) Calculate ΔG for the process below, the combustion of methane. Standard free energies of formation,...

a) Calculate ΔG for the process below, the combustion of methane. Standard free energies of formation, △G°, in kJ/mol, are given below each reactant and product in the process shown below. CH4(g) + O2(g) → CO2(g) + H2O(g) (not balanced!) – 50.8 – 394.4 – 228.6 b) Coal gasification can be represented by the balanced equation: 2 C(s) + 2 H2O(g) → CH4(g) + CO2(g) Using the free energies from part a), calculate ΔG for this reaction. c) Write the...

Use standard free energies of formation to calculate ΔG∘ at 25∘C for each of the following...

Use standard free energies of formation to calculate ΔG∘ at 25∘C for each of the following reactions. 1. CoO(s)+H2(g)→Co(s)+H2O(g) 2. NH4I(s)→HI(g)+NH3(g) 3.H2(g)+FeO(s)→Fe(s)+H2O(g) 4.SiH4(g)→Si(s)+2H2(g)

Part A Calculate the standard enthalpy change for the reaction 2A+B⇌2C+2D where the heats of formation...

Part A Calculate the standard enthalpy change for the reaction 2A+B⇌2C+2D where the heats of formation are given in the following table: Substance ΔH∘f (kJ/mol) A -241 B -391 C 197 D -497 Express your answer in kilojoules. Hints ΔH∘rxn = 273 kJ SubmitMy AnswersGive Up Correct Part B For the reaction given in Part A, how much heat is absorbed when 2.80 mol of A reacts? Express your answer numerically in kilojoules. Hints kJ SubmitMy AnswersGive Up Part C...

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