P6 Flashcards
(22 cards)
Radiation
When heat travels as waves we say it is traveling by radiation. No particles are needed. Radiation can travel through a vacuum. The transfer of heat by Infrared waves.
Infrared radiation
Another word for heat radiation
Temperature
How hot or cold something is
Thermal energy
AKA heat energy. Energy that moves from one object to another causing its temperature to rise
Thermal capacity
How much energy is needed to raise the objects temperature by one degree Celsius
Specific heat capacity
How much energy is needed to raise the temperature of 1kg of the substance by 1 degree Celsius
Latent heat
The energy that is used to change a substance’s state but not increase it’s temperature. It is the energy that breaks binds between particles
Latent heat of fusion
The latent heat when describing solid/ liquid changes
Latent heat of vaporization
Latent heat when describing liquid/ gas changes
Ways for heat to be transferred
1) radiation
2) conduction- caused by radiation
3) convection currents- movement of air particles
Unit of measurement for thermal capacity
J/degree Celsius
Unit of measurement for specific heat capacity
J/kg degree Celsius
Equation for thermal capacity
Heat input/ change in temp
Q/delta t
Equation for specific heat capacity
Q=m X c X delta T
Q=amount of energy added
m= mass of substance you are hearing
c= specific heat capacity of the substance you are heating
Delta T= change in temperature after it had been heated.
Conduction
Heat traveling due to the vibration of particles
Equation for kinetic energy
KE =1/2 m v squared
Half the mass times volume squared
Equation for potential energy
PE= mgh
Mass times gravity times height
Equation for efficiency
Efficiency= useful energy out/ total energy in times one hundred (for percentage)
Equation for thermal capacity
E= delta T times thermal capacity
Unit of measurement for thermal capacity
J/ degrees Celsius
Main method of heat transfer in fluids
Convection
Convection
When a fluid (liquid or gas) is heated it expands, becomes less dense and rises.
The flow of heat from places of higher temperature to places of lower temperature by movement of particles themselves.
