Calorimetry Experiments There are two types of calorimetry experiments you need to know for IB Chemistry: Enthalpy changes of reactions in solution Enthalpy changes of combustion In both cases you ...
Modulus Functions - Sketching Graphs Modulus functions The modulus function makes any ‘input’ positive |x| = x if x ≥ 0 |f(x)| = f(x) if f(x) ≥ 0 |x| = -x if x < 0 |f(x)| = -f(x) ...
Calorimetry Measuring enthalpy changes Calorimetry is a technique used to measure changes in enthalpy of chemical reactions A calorimeter can be made up of a polystyrene drinking cup, a vacuum flas...
Standard Enthalpy Change Standard conditions To compare the changes in enthalpy between reactions, all thermodynamic measurements are made under standard conditions These standard conditions are: A...
Temperature & Kinetic Energy What is the difference between heat and temperature? This can be illustrated using a beaker of boiling water and a pipette: The effects of boiling water can be quit...
Alloys Alloys are mixtures of metals, where the metals are mixed together physically but are not chemically combined They can also be made from metals mixed with nonmetals such as carbon Ions of th...
Inverse Functions What is an inverse function? An inverse function is the opposite to the original function An inverse function is denoted by The inverse of a function only exists if the fun...
Trends in Melting Points of Metals The strength of electrostatic attraction can be increased by: Increasing the number of delocalised electrons per metal atom Increasing the positive charges on the...
Composite Functions What is a composite function? A composite function is where one function is applied after another function The ‘output’ of one function will be the ‘input’ of the next on...
