Thermodynamics is the study of process in which______.
energy is transferred as heat and work.
no mass enters or leaves, but energy may be exchanged
mass as well as energy may enter or leaves the system.
formula for Heat
The First Law of Thermodynamics is a restatement of the______.
Law of Conservation of Energy
An isothermal process is_______.
an ideal process that is carried out at a constant temperature.
An adiabatic process is one in which______.
no heat is allowed to flow into or out of the system.
A P-V diagram is a diagram is a diagram that compares______.
pressure with volume.
What are metabolisms?
A energy-transforming process that occurs within an orgasm.
What is the source of the human body's internal energy usually stored in food?
The energy derived from the food we eat gets transformed into total_____and______.
internal energy and work.
What is the metabolic rate?
the rate at which internal energy is transformed within the body.
What is metabolic rate usually specified in?
kcal/hr or watts.
What is the 2nd law of thermodynamics?
Processes that occur in nature and those that do not occur in nature.
What is a heat engine?
any device that changes thermal energy into mechanical work.
What is the basic idea behind any heat engine?
That mechanical energy can be obtained from thermal energy.
What does a Steam Engine do?
Gets work from thermal energy.
What are the two main types of steam engines?
How is most electricity generated today?
What did Sadi Cornut do?
examined the characteristics of an ideal engine in order to see how to increase efficiency.
is it possible to create a 100% efficient engine?
Are refridgerators different from heat engines? Why or why not?
yes, they transfer heat out of a cool environment into a warm environment.
How can entropy be defined?
as a measure of the disorder of a system.
Natural processes tend to move toward a state of greater_____.
Heat death refers to what?
the universe approaching a state of thermal energy.