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Pearson Edexcel IAL Chemistry

Unit 1: Structure, Bonding and Introduction to Organic Chemistry

Unit 2: Energetics, Group Chemistry, Halogenoalkanes and Alcohols

Topic 6: Energetics

6.1—The enthalpy change, ∆H, is the heat energy change measured at constant pressure and that standard conditions are 100 kPa

6.2—That, by convention, exothermic reactions have a negative enthalpy change and endothermic reactions have a positive enthalpy

6.3—Construct and interpret enthalpy level diagrams, showing exothermic and endothermic enthalpy changes

6.4—The definition of standard enthalpy change of: i reaction, ∆rH ii formation, ∆fH iii combustion, ∆cH iv neutralisation

6.5—Experimental data to calculate: i energy transferred in a reaction recalling and using the expression: energy transferred

6.6—Hess’s Law

6.7—CORE PRACTICAL 2 Determination of the enthalpy change of a reaction using Hess’s Law

6.8—Evaluate the results obtained from experiments and comment on sources of error and uncertainty and any assumptions made

6.9—The terms ‘bond enthalpy’ and ‘mean bond enthalpy’

6.10—Mean bond enthalpies from enthalpy changes of reaction

6.11—Bond enthalpy data gives some indication about which bond will break first in a reaction, how easy or difficult it is

Topic 7: Intermolecular Forces

Topic 8: Redox Chemistry and Groups 1, 2 and 7

Topic 9: Introduction to Kinetics and Equilibria

Topic 10: Organic Chemistry: Halogenoalkanes, Alcohols and Spectra

Unit 3: Practical Skills in Chemistry I

Assessed mathematical skills and measurement conventions

A-Level/Edexcel/Chemistry//AS/Concept/Unit 2: Energetics, Group Chemistry, Halogenoalkanes and Alcohols/Topic 6: Energetics/6.10—Mean bond enthalpies from enthalpy changes of reaction

Unit 2: Energetics, Group Chemistry AS, Halogenoalkanes and Alcohols

Syllabus: 2017
Section: —
Level: AS

Exam analysis

Most tested topics

Topic 6: Energetics
Topic 7: Intermolecular Forces
Topic 8: Redox Chemistry and Groups 1, 2 and 7
Topic 9: Introduction to Kinetics and Equilibria
Topic 10: Organic Chemistry: Halogenoalkanes, Alcohols and Spectra