physics.first_law_of_thermodynamics

law of conservation of energy. This also results in the observation that, in an externally isolated system, even with internal changes, the sum of all forms of energy must remain constant, as energy cannot be created or destroyed.

Check out the formula used to calculate this flux:

Q = ΔU + W |

Q = heat added or removed from the system. ΔU = variation of internal energy of the system. W = work done by the system on its surroundings.

OBS: All units must be equal to each other. (Description adapted from https://en.wikipedia.org/wiki/Laws_of_thermodynamics )

Functions

__categorize_system(→ None)	Categorizes the system based on the work done, heat added/removed,
__check_args(→ None)	Check that the arguments are valid.
heat(→ float)
internal_energy_variation(→ float)
work(→ float)

Module Contents

physics.first_law_of_thermodynamics.__categorize_system(argument_value: float, argument_name: str) → None

Categorizes the system based on the work done, heat added/removed, and internal energy variation. >>> __categorize_system(0, “work”) The system is isochoric (constant volume). >>> __categorize_system(50, “heat”) The system is endothermic (absorbing heat). >>> __categorize_system(-20, “internal_energy_variation”) The internal energy of the system is decreasing. It cooling down. >>> __categorize_system(10, “invalid”) Traceback (most recent call last):

…

ValueError: Should be ‘work’, ‘heat’, or ‘internal_energy_variation’.

physics.first_law_of_thermodynamics.__check_args(argument: float) → None

Check that the arguments are valid. >>> __check_args(“50”) Traceback (most recent call last):

…

TypeError: Invalid argument. Should be an integer or float.

physics.first_law_of_thermodynamics.heat(internal_energy_variation: float, work: float) → float

>>> heat(-20.0, 30.0)
The internal energy of the system is decreasing. It cooling down.
The system is expanding.
The system is endothermic (absorbing heat).
10.0
>>> heat(50.0, 0.0)
The internal energy of the system is increasing. It heating up.
The system is isochoric (constant volume).
The system is endothermic (absorbing heat).
50.0
>>> heat(20.0, -70.0)
The internal energy of the system is increasing. It heating up.
The system is compressing.
The system is exothermic (releasing heat).
-50.0

physics.first_law_of_thermodynamics.internal_energy_variation(heat: float, work: float) → float

>>> internal_energy_variation(50.0, 30.0)
The system is endothermic (absorbing heat).
The system is expanding.
The internal energy of the system is increasing. It heating up.
20.0
>>> internal_energy_variation(50.0, 0.0)
The system is endothermic (absorbing heat).
The system is isochoric (constant volume).
The internal energy of the system is increasing. It heating up.
50.0
>>> internal_energy_variation(-50.0, -70.0)
The system is exothermic (releasing heat).
The system is compressing.
The internal energy of the system is increasing. It heating up.
20.0

physics.first_law_of_thermodynamics.work(heat: float, internal_energy_variation: float) → float

>>> work(50.0, -20.0)
The system is endothermic (absorbing heat).
The internal energy of the system is decreasing. It cooling down.
The system is expanding.
70.0
>>> work(50.0, 50.0)
The system is endothermic (absorbing heat).
The internal energy of the system is increasing. It heating up.
The system is isochoric (constant volume).
0.0
>>> work(-50.0, 20.0)
The system is exothermic (releasing heat).
The internal energy of the system is increasing. It heating up.
The system is compressing.
-70.0