17.2 Measuring and Expressing Enthalpy Changes--Vocabulary and Key Concepts

Thermochemical equation

A chemical equation that involves the enthalpy change

How can you expess the enthalpy change for a reaction in a chemical equation?

In a chemical equation, the enthalpy change for the reaction can be written as either a reactant or a product.

What basic concepts apply to calorimetry?

In calorimetry, the heat released by the system is equal to the heat absorbed by its surroundings. Conversely, the heat absorbed by a system is equal to the heat released by its surroundings.

Heat of reaction

The enthalpy change for the chemical equation exactly as it is written

Enthalpy (H)

The heat content of a system at constant pressure

Heat of combustion

The heat of the reaction for the complete burning of one mole of a substance

Calorimeter

The insulated device used to measure the absorption or release of heat in chemical or physical processes

Calorimetry

The precise measurement of the heat flow into or out of a system for chemical and physical processes