a) Benzoic acid, p-methylbenzoic acid and p-chlorobenzoic acid Interpretation: Benzoic acid, p-methylbenzoic acid and p-chlorobenzoic acid are to be ranked in the order of their increasing acidity. Concept introduction: Electron withdrawing groups present on the benzene ring increase the acidity of the acids while electron releasing groups present on the benzene ring decrease the acidity of the acids. To rank: Benzoic acid, p-methylbenzoic acid and p-chlorobenzoic acid in the order of their increasing acidity.

Question

In the following reaction, what quantity in moles of CH₃OH are required to give off 4111 kJ of heat? 2 CH₃OH (l) + 3 O₂ (g) → 2 CO₂ (g) + 4 H₂O(g) ∆H° = -1280. kJ

Answer 1

Question

Chapter 20.4, Problem 9P

Interpretation Introduction

a) Benzoic acid, p-methylbenzoic acid and p-chlorobenzoic acid

Interpretation:

Benzoic acid, p-methylbenzoic acid and p-chlorobenzoic acid are to be ranked in the order of their increasing acidity.

Concept introduction:

Electron withdrawing groups present on the benzene ring increase the acidity of the acids while electron releasing groups present on the benzene ring decrease the acidity of the acids.

To rank:

Benzoic acid, p-methylbenzoic acid and p-chlorobenzoic acid in the order of their increasing acidity.

Interpretation Introduction

b) p- Nitrobenzoic acid, acetic acid and benzoic acid

Interpretation:

p- Nitrobenzoic acid, acetic acid and benzoic acid are to be ranked in the order of their increasing acidity.

Concept introduction:

Electron withdrawing groups present on the benzene ring increase the acidity of the acids while electron releasing groups present on the benzene ring decrease the acidity of the acids.

To rank:

p- Nitrobenzoic acid, acetic acid and benzoic acid in the order of their increasing acidity.

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In the following reaction, what quantity in moles of CH₃OH are required to give off 4111 kJ of heat? 2 CH₃OH (l) + 3 O₂ (g) → 2 CO₂ (g) + 4 H₂O(g) ∆H° = -1280. kJ

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1. Consider these three reactions as the elementary steps in the mechanism for a chemical reaction. 2600 2400 2200 2000 1800 1600 1400 1200 1000 800 Potential Energy (kJ) 600 400 200 0 -200- -400 -600- -800 (i) Cl₂ (g) + Pt(s) → 2Cl (g) + Pt(s) (ii) Cl (g)+ CO (g) + Pt (s) → CICO (g) + Pt (s) Ea = 1550 kJ Ea = 2240 kJ (iii) Cl (g) + CICO (g) → Cl₂CO (g) Ea = 2350 kJ AH=-950 kJ ΔΗ = 575 ΚΙ AH=-825 kJ a. Draw the potential energy diagram for the reaction. Label the data points for clarity. The potential energy of the reactants is 600 kJ Reaction Progress b. What is the overall chemical equation? c. What is the overall change in enthalpy for the above chemical reaction? d. What is the overall amount of activation energy for the above chemical reaction? e. Which reaction intermediate would be considered a catalyst (if any) and why? f. If you were to add 2700kJ of energy to the reaction (e.g. 2700 kl of heat or electricity), would you be able to make the reaction reverse itself (i.e. have…