Unit One: Chemical Reactions. Lesson two: the speed of chemical reactions.Keywords (English): temperature – reaction rate – energy – collisions – chemistry

Endothermic reactionsKeywords (English): endothermic reactions – energy absorption – thermal change

the goal:Measuring the change in temperature of a mass of water during a combustion reaction.Materials and tools:Candle - Small metal box - Large open-ended metal box - Steel wool - Balance - Pen - Stirring rod - ThermometerSteps:1. Light the candle and weigh the large container.2. Fill the containe......

Keywords: Solubility product – Sparingly soluble salts – Equilibrium – Solutions – Comparison

Keywords: Equilibrium – Equal forces – Rest – Uniform motion

Keywords: Calories – Food – Energy – Combustion – Heat

Keywords: Specific heat – Thermal energy – Mass – Temperature

Keywords: Cold materials – Heat transfer – Absorption – Temperature

Keywords: Equilibrium – Forces – Motion – Position – Physics

Exothermic and Endothermic Reactions