Chapter 14 - Heat

Calorie

The amount of heat necessary to raise the temperature of 1 gram of water by 1 degree Celsius

Heat

The energy transferred from one object to another because of a difference in temperature

Internal Energy

The sum of the energy of all the moleculaes in an object, also called thermal energy

Specific Heat

Unique to each material, this is used to determine how much temperature will change with a given amount of heat, units of kcal/kg∗ ◦C or cal/g∗ ◦C

System

Object(s) considered in a problem

Open System

A system where mass not leave, if energy does not leave either it is said to be

Closed System

A system where mass and energy may leave

Thermal Equilibrium

A state that describes when an entire system has reached the same temperature

Calorimetry

A technique that measures heat exchange

Calorimeter

A device that measures heat exchange, used to determine the specific heats of substances

Bomb Calorimeter

Used to measure thermal energy released from substances burning, also usedto measure the caloric content of foods

Heat of fusion

Refers to the heat required to convert 1.0kg of a substance from solid to liquid

Heat of Vaporization

Refers to the heat required to convert 1.0kg of a substance from liquid tovapor

Evaporation

The process of a liquid converting to a gas at room temperature

Conduction

A method of heat transfer through direct contact with a heat course

Convection

Process by which heat flows by bulk movement of molecules from one place to another

Radiation

Heat transferred as radiant energy

Themography

A technique that measured the intensity of infrared rays from many points on thebody to form a picture