Ozonolysis of o-xylene yielded three products, glyoxal, 2,3-butanedione and pyruvaldehyde in 3:1:2 ratio. What conclusion can be obtained about the structure of o-xylene from this observation is to be stated. Concept introduction: During ozonolysis double bonds present in compounds gets cleaved to give carbonyl compounds. Each carbon in the double bond gets bonded to an oxygen atom. As the benzene ring can be represented by two different resonance forms during ozonolysis, compounds with substituent groups on the benzene ring yield different products. The final ratio in which different products will be formed can be arrived at by considering the products of the ozonolysis of different resonance forms of the reactant. To state: What conclusion can be obtained about the structure of o-xylene from the observation that upon ozonolysis it yielded three products, glyoxal, 2,3-butanedione and pyruvaldehyde in 3:1:2 ratio.

Question

LTS Solid: AT=Te-Ti Trial 1 Trial 2 Trial 3 Average ΔΗ Mass water, g 24.096 23.976 23.975 Moles of solid, mol 0.01763 001767 0101781 Temp. change, °C 2.9°C 11700 2.0°C Heat of reaction, J -292.37J -170.473 -193.26J AH, kJ/mole 16.58K 9.647 kJ 10.85 kr 16.58K59.64701 KJ mol 12.35k Minimum AS, J/mol K 41.582 mol-k Remember: q = mCsAT (m = mass of water, Cs=4.184J/g°C) & qsin =-qrxn & Show your calculations for: AH in J and then in kJ/mole for Trial 1: qa (24.0969)(4.1845/g) (-2.9°C)=-292.37J qsin = qrxn = 292.35 292.37J AH in J = 292.375 0.2923kJ 0.01763m01 =1.65×107 AH in kJ/mol = = 16.58K 0.01763mol mol qrx Minimum AS in J/mol K (Hint: use the average initial temperature of the three trials, con Kelvin.) AS=AHIT (1.65×10(9.64×103) + (1.0 Jimai

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Chapter 15.SE, Problem 28AP

Interpretation Introduction

Interpretation:

Ozonolysis of o-xylene yielded three products, glyoxal, 2,3-butanedione and pyruvaldehyde in 3:1:2 ratio. What conclusion can be obtained about the structure of o-xylene from this observation is to be stated.

Concept introduction:

During ozonolysis double bonds present in compounds gets cleaved to give carbonyl compounds. Each carbon in the double bond gets bonded to an oxygen atom. As the benzene ring can be represented by two different resonance forms during ozonolysis, compounds with substituent groups on the benzene ring yield different products. The final ratio in which different products will be formed can be arrived at by considering the products of the ozonolysis of different resonance forms of the reactant.

To state:

What conclusion can be obtained about the structure of o-xylene from the observation that upon ozonolysis it yielded three products, glyoxal, 2,3-butanedione and pyruvaldehyde in 3:1:2 ratio.

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LTS Solid: AT=Te-Ti Trial 1 Trial 2 Trial 3 Average ΔΗ Mass water, g 24.096 23.976 23.975 Moles of solid, mol 0.01763 001767 0101781 Temp. change, °C 2.9°C 11700 2.0°C Heat of reaction, J -292.37J -170.473 -193.26J AH, kJ/mole 16.58K 9.647 kJ 10.85 kr 16.58K59.64701 KJ mol 12.35k Minimum AS, J/mol K 41.582 mol-k Remember: q = mCsAT (m = mass of water, Cs=4.184J/g°C) & qsin =-qrxn & Show your calculations for: AH in J and then in kJ/mole for Trial 1: qa (24.0969)(4.1845/g) (-2.9°C)=-292.37J qsin = qrxn = 292.35 292.37J AH in J = 292.375 0.2923kJ 0.01763m01 =1.65×107 AH in kJ/mol = = 16.58K 0.01763mol mol qrx Minimum AS in J/mol K (Hint: use the average initial temperature of the three trials, con Kelvin.) AS=AHIT (1.65×10(9.64×103) + (1.0 Jimai

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