Temperature, thermal energy and heat
What is temperature?
the degree or intensity of heat present in a substance or object, especially as expressed according to a comparative scale and shown by a thermometer or perceived by touch.
How would you explain conduction thermal energy?
Conduction occurs when two object at different temperatures are in contact with each other.
What are some common types of heating systems?
The most popular space heating systems are forced air furnaces, hot water boilers and electric heat pumps.
How are thermal energy and temperature related?
Temperature is related to but not the same as thermal energy. Thermal energy and temperature both depend on the kinetic energy of the particles in a substance.
How would you explain convection thermal energy?
Convection is heat transfer by mass motion of a fluid such as air or water when the heated fluid is caused to move away from the source of heat, carrying energy with it.
How would you explain the 1st law of thermodynamics?
The First Law of Thermodynamics states that heat is a form of energy, and thermodynamic processes are therefore subject to the principle of conservation of energy.
What is the difference between thermal energy and heat?
The difference between heat and thermal energy is that thermal energy is not in the process of being transferred; it is not in transit, but remains as part of the internal energy of the system; heat, on the other hand, is energy in transit, i.e. energy in the process of being transferred from a hotter system.
How would you explain radiation thermal energy?
Thermal radiation (often called infrared radiation) is a type electromagnetic radiation(or light).
How would you explain the 2nd law of thermodynamics?
The second law of thermodynamics states that the total entropy of an isolated system can never decrease over time.
How can you calculate the change in thermal energy?
Always calculate the change in temperature by subtracting the initial temperature from the final temperature.
How do thermal conductors differ from thermal insulators?
They are opposites. A good thermal conductor is a poor thermal insulator and vice versa. A good thermal conductor allows transfer of heat energy readily and a good thermal insulator will block transfer of thermal energy.
How would you explain heat engine?
In thermodynamics and engineering, a heat engine is a system that converts heat or thermal energy—and chemical energy—to mechanical energy, which can then be used to do mechanical work.
How would you explain specific heat?
The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.
How are thermal insulators used to control the transfer of thermal energy?
Thermal insulators are used to control the transfer of thermal energy because it shows the process by trapping the heat.
Give an example of energy conversion
Gasoline