Please enable JavaScript.
Coggle requires JavaScript to display documents.
First Law of Thermodynamics - Coggle Diagram
First Law of Thermodynamics
BIG IDEA
How can we quantitively connect heat and change in temperature?
Thermodynamic Terms and Concepts.
Enthalpy = Heat
Heat(q) = the transfer of thermal energy between objects and systems
Thermal Energy = Kinetic energy associated with the random motion of atoms and molecules
Temperature
A representation of the average atomic energy of a system relative to a reference point.
The word "Hot" does not indicate a specific temperature or energy value. It indicates that the object being described has more thermal energy than the tool doing the measurement. Vice versa for cold.
Picking up a cup of water that has more thermal energy than your hand will feel hot to the touch.
This also accounts for an object feeling like different temperatures depending on the heat of your hand when you touch an object.
U = Total Energy w = work q = heat
First Law of Thermodynamics
Energy is neither created nor destroyed.
Mathematical Forms
Delta U = 0 = Delta U sys + Delta U surr
Delta U sys = - Delta U surr
Specific Heat Capacity(c)
Specific Heat Capacity relates to the amount of energy required for a substance to change temperature
For Water c = 4.184 J
g^-1
(C or K)^-1
Specific Heat Capacity is an intrinsic value. This means that the specific heat capacity of a given element should remain constant for all samples of that element.
q = m
c
Delta T