Heat
Basics of Heat
Heat is a form of energy that always moves from warmer objects to cooler ones
The transfer of heat energy is the movement of thermal energy:
- The amount of thermal energy is based on an objects temperature and size;
The warmer and the bigger an object is, the more thermal energy it has
The only thing that matters for heat transfer is the temperature of the two objects
- Once both objects reach the same temperature, the transfer of heat energy
stops
All matter is made up of particles:
atoms, molecules, and ions (all far to small for the naked eye to see)
particles are always moving - have kinetic energy - movement energy
The particles in solids, liquids, and gases have different amounts of kinetic energy
Gases move freely at high speeds and have a lot of kinetic energy whereas solid
objects have much less kinetic energy and vibrate in a fixed position. Liquids
are in the middle of these. The runnier the liquid, the more kinetic energy the
atoms have
Thermal energy is a measure of the motion of particles
all substances have some thermal energy - even very cold objects - because
particles are always moving to some extent
Conduction
There are three types of heat transfer:
conduction - by direct contact
convection - by the flow of matter
Heat 1
Basics of Heat
Heat is a form of energy that always moves from warmer objects to cooler ones
The transfer of heat energy is the movement of thermal energy:
- The amount of thermal energy is based on an objects temperature and size;
The warmer and the bigger an object is, the more thermal energy it has
The only thing that matters for heat transfer is the temperature of the two objects
- Once both objects reach the same temperature, the transfer of heat energy
stops
All matter is made up of particles:
atoms, molecules, and ions (all far to small for the naked eye to see)
particles are always moving - have kinetic energy - movement energy
The particles in solids, liquids, and gases have different amounts of kinetic energy
Gases move freely at high speeds and have a lot of kinetic energy whereas solid
objects have much less kinetic energy and vibrate in a fixed position. Liquids
are in the middle of these. The runnier the liquid, the more kinetic energy the
atoms have
Thermal energy is a measure of the motion of particles
all substances have some thermal energy - even very cold objects - because
particles are always moving to some extent
Conduction
There are three types of heat transfer:
conduction - by direct contact
convection - by the flow of matter
Heat 1
