Factors of Chemical Reactions - Measuring Enthalpy Change

These flashcards cover key vocabulary and concepts related to factors affecting chemical reactions and the measurement of enthalpy changes.

Endothermic Reaction

A reaction that absorbs energy from the surroundings, resulting in a temperature decrease.

Exothermic Reaction

A reaction that releases energy to the surroundings, resulting in a temperature increase.

Enthalpy Change (ΔH)

The heat transferred at constant pressure during a chemical reaction, measured in kJ/mol.

Thermochemistry

The study of heat changes that occur during chemical reactions.

Specific Heat Capacity (c)

The amount of heat energy required to raise the temperature of 1 kg of a substance by 1 K.

Energy Profile

A visual representation of the enthalpy change during a reaction, showing reactants, products, and activation energy.

Calorimetry

An experimental technique used to measure the heat of a chemical reaction by observing temperature changes.

Standard Enthalpy Change (ΔHΘ)

The enthalpy change under standard conditions, typically measured at 1 atm pressure and a specified temperature.

Thermal Equilibrium

A state where two objects reach the same temperature and there is no net heat transfer between them.

Activation Energy (Ea)

The minimum energy required to initiate a chemical reaction.