IB-Chemistry
Reactivity 1
IB Chemistry lessons and exam-style practice covering energy changes, fuels and chemical
Lessons in this unit
Work through the topics in order.
R-1.1.1 &1.1.2&1.1.3 Exothermic and endothermic reactions
Explore exothermic and endothermic reactions, energy transfer between system and surroundings, and enthalpy changes during chemical reactions.
R-1.1.4 Calorimetry
Learn how calorimetry is used to measure energy changes in chemical reactions by monitoring temperature changes in a known mass.
R-1.2.1 Bond enthalpies
Learn how average bond enthalpies can be used to calculate enthalpy changes from the bonds broken and formed during a reaction.
R-1.2.2 Hess law
Learn how Hess’s law is used to calculate enthalpy changes by combining thermochemical equations and their enthalpy values.
R-1.2.3 & 1.2.4 Standard Enthalpy Changes and Hess’s Law
Learn how standard enthalpy changes of formation and combustion are used with Hess’s law to calculate enthalpy changes for chemical reactions.
R-1.2.5 Born–Haber Cycles and Lattice Enthalpy
Learn how Born–Haber cycles apply Hess’s law to ionic compounds and use energy changes to determine lattice enthalpy and other thermodynamic values.
R-1.3.1 & 1.3.2 Complete and incomplete combustion
Compare complete and incomplete combustion and learn how oxygen availability determines the products formed during hydrocarbon combustion.
R-1.3.3 Fossil fuels
Explore fossil fuels as non-renewable energy sources, including their combustion, energy production and environmental impacts.
R-1.3.4 & 1.3.5 Renewable and non renewable sources. Fuel cells
Explore renewable and non-renewable energy sources and learn how fuel cells convert chemical energy directly into electrical energy.
R-1.4.1 & 1.4.2 Entropy and Gibbs Energy
Explore entropy as the dispersal of matter and energy, calculate standard entropy changes, and use enthalpy, entropy and temperature to calculate Gibbs energy.
R-1.4.3 & 1.4.4 Gibbs Energy, Spontaneity and Equilibrium
Use Gibbs energy to predict reaction spontaneity, determine the temperature at which reactions become spontaneous, and explore the relationship between Gibbs energy and equilibrium.