Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 26 - Energetics. Contains short answer questions, an activity requiring lateral thinking and exam-style questions.

Specification Point 3.1 - Know that chemical reactions in which heat energy is given out are described as exothermic, and those in which heat energy is taken in are described as endothermic.

Specification Point 3.2 - Describe simple calorimetry experiments for reactions such as combustion, displacement, dissolving and neutralisation.

Specification Point 3.3 - Calculate the heat energy change from a measured temperature change using the expression Q = mcΔT.

Specification Point 3.4 - Calculate the molar enthalpy change (ΔH) from the heat energy change, Q.

Specification Point 3.8 - Practical: investigate temperature changes accompanying some of the following types of change: salts dissolving in water, neutralisation reactions, displacement reactions and combustion reactions.

Complete set of Chapter 6 Worksheets are available.