Thermal Energy Flashcards

temperature
measure of the average kinetic energy of the particles in an object
thermal energy
the sum of the kinetic and potential energy of all the particles in an object
heat
thermal energy that flows from something at a higher temperature to something at a lower temperature
specific heat
the amount of heat needed to raise the temperature of 1 kg of an object 1 degree celsius
thermal energy change formula
Q = m x temp. change x specific heat
conduction
the transfer of thermal energy by collisions between particles in matter
convection
the transfer of thermal energy in a fluid by the movement of warmer and cooler fluid from place to place
radiation
the transfer of energy by electromagnetic waves
insulator
a material in which heat flows slowly
thermodynamics
the study of the relationship among thermal energy, heat, and work
first law of thermodynamics
the increase in thermal energy of a system equals the work done on the system plus the heat transferred to the system
second law of thermodynamics
it is impossible for heat to flow from a cool object to a warmer object unless work is done
heat engine
a device that converts heat into work
internal combustion engine
the heat engine in a car
intake stroke
intake stroke
Fuel/air is drawn into the chamber
compression stroke
compression stroke
The fuel/air is compressed near the spark plug
power stroke
power stroke
The spark plug ignites the fuel/air
exhaust stroke
exhaust stroke
Gases left over in the cylinder are removed through an exhaust valve