Chapter 6 - Thermochemistry: Energy Flow and Chemical Change

Polymer fibers

________ in winter clothes, for example, impede the transfer of heat energy away from the body.

Natural gas

________ and oil, for example, release energy that we use to cook our food, heat our houses, and power our cars.

Central Asia

A rainstorm in ________ or a methane blizzard on Neptune are unlikely to impact the contents of the flask, but the temperature and pressure of the lab may.

Greek delta

(________) means "change (or difference) in "and is computed as the result of subtracting the beginning state from the end state As a result, E is the total amount of energy released by the system minus the initial amount:

Metal

________ wires facilitate the transmission of electrical energy.

Solar energy

________ may be converted into food.

clouds of smoke

The mechanism that drives the train down the track, following ________ behind it, involves both chemical and physical changes.

Thermodynamics

study of energy and its changes

Each particle in a sytem

possesses potential and kinetic energy, and the total of these energies is the system's internal energy, E (some sources use the symbol U)

Change/difference in

ΔE = Final − Initial = Products − Reactants

Heat

often known as thermal energy (symbolized by q), is the energy transmitted as a result of a temperature differential between the system and its surroundings

Work

the energy transmitted when an item is moved by a force, is involved in all other kinds of energy transmission