Energy Flashcards
What is heat radiation?
The transfer of heat energy by infrared radiation.
How can heat energy be transferred?
By radiation, conduction or convection.
What types of energy transfer involve the transference of particles?
Conduction and convection
What is the main for of energy transfer in solids?
Conduction
What is the main form of heat transfer in liquids and gases?
Convection
Infrared radiation can be emitted by……
Solids, liquids and gases.
Where is infrared radiation emitted from?
The surface of an object
What is conduction of heat energy?
The process where vibrating particles pass on their extra kinetic energy to neighbouring particles
When does conduction work faster?
In denser solids
When does convection occur?
When the more energetic particles move from the hotter region to the cooler region, taking their heat energy with them.
How does an immersion heater work?
See page 14 of CGP book
What are convection currents about?
Changes in density
What factors affect the rate of reaction so it will be faster?
- higher temperature
- lower density
- larger surface area
- greater airflow over the liquid
The rate of condensation will be faster if:
- temperature of gas is lower
- temperature of the surface the gas touches is lower
- density is higher
- airflow is less
