Concept Thermochemistry Vocabulary

Front 1

energy

Back 1

The capacity to do work or produce heat; exists as potential energy, which is stored in an object due to its composition or position, and kinetic energy, which is the energy of motion.

Front 2

law of conservation of energy

Back 2

States that in any chemical or physical process, energy may change from one form to another but it is neither created or destroyed.

Front 3

chemical potential energy

Back 3

The energy stored in a substance because of its composition; is released or absorbed as heat during chemical reactions or processes.

Front 4

heat

Back 4

A form of energy that flows from a warmer object to a cooler object.

Front 5

calorie

Back 5

The amount of energy required to raise the temperature of one gram of pure water by one degree Celsius.

Front 6

joule

Back 6

The SI unit of heat and energy.

Front 7

specific heat

Back 7

The amount of heat required to raise the temperature of one gram of a given substance by one degree Celsius.

Front 8

calorimeter

Back 8

An insulated device that is used to measure the amount of heat released or absorbed during a physical or chemical process.

Front 9

thermochemistry

Back 9

The study of heat changes that accompany chemical reactions and phase changes.

Front 10

system

Back 10

In thermochemistry, the specific part of the universe containing the reaction or process being studied.

Front 11

surroundings

Back 11

In thermochemistry, included everything the universe except the system.

Front 12

universe

Back 12

In thermochemistry, is the system plus the surroundings.

Front 13

enthalpy

Back 13

The heat content of a system at constant pressure.

Front 14

enthalpy (heat) of reaction

Back 14

The change in enthalpy for a reaction-the difference between the enthalpy of the substances that exist at the end of the reaction and the enthslpy of the substances present at the start.