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Chemical Kinetics Quiz: Second and First-Order Reactions

12 Questions

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Chemical Kinetics Quiz: Second and First-Order Reactions

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Questions and Answers

What is true about the half-time of a second-order reaction?

It is proportional to the initial concentration of the reactant

It is independent of the initial concentration of the reactant (correct)

It is dependent on the initial concentration of the reactant but not in a simple way

It is inversely proportional to the initial concentration of the reactant

What is the unit of the rate constant k in a first-order reaction?

mol.L-1.s-1

s-1 (correct)

L.s-1

Which property is used when calculating the enthalpy change of a reaction using Hess's law?

Enthalpy (correct)

Pressure

Temperature

Entropy

What is the term for the study of the heat associated with chemical reactions and physical processes?

Thermochemistry Signup and view all the answers

What type of system can exchange energy with its surroundings freely?

Open System Signup and view all the answers

What is the term for a process that gives out heat and transfers heat energy to the surroundings?

Exothermic Signup and view all the answers

What is the correct formula for the acid dissociation constant Ka for the reaction HCl + H2O → H3O+ + Cl-?

[H3O+][Cl-]/[HCl] Signup and view all the answers

What is the relationship between Ka and Kb values and acid and base strength?

The higher the Ka and Kb values, the stronger the acid or base. Signup and view all the answers

What is a titration curve?

A graph of volume vs. pH for a titration. Signup and view all the answers

Which of the following acids is a strong acid?

HNO3 Signup and view all the answers

What is the acid-dissociation constant Ka for the pyridinium ion, C5H5NH+, given the base-dissociation constant Kb for pyridine, C5H5N, is 1.4 × 10-9?

7.1 × 10-4 Signup and view all the answers

What types of elements typically form ionic bonds?

Metal to Nonmetal Signup and view all the answers