Thermodynamics Flashcards
Temperature is the measure of
Internal energy
What is the equation to determine Fº from Cº?
Tf = 9/5 • Cº + 32º
How do solids experience thermal expansion?
They increase in size
What is the equation for solid thermal expansion?
∆L = alpha • L0 • ∆T
How do liquids experience thermal expansion?
They expand via volume
What is the equation for liquid thermal expansion?
∆V = B • V0 • ∆T
Heat is the
Energy transferred between two objects
1 Cal is equal to how many Joules?
4184 Joules
Conduction is the
Direct heat transfer of heat between molecules via Collision
Convection is the
Transfer of heat via physical motion of heated materials
Convection is only done in
Fluids
What happens to the heated portions in convection?
Heated portions rise
Radiation is the
Transfer of energy by electromagnetic waves via a vacuum
What is the equation of specific heat?
q = mc∆t
During phase change, heat is
q = mL
Energy changes due to the
Exchange of heat or work
Work done is located by finding the
Area under a P • V curve
How is the work when V is constant?
Work = 0
If Pressure is constant, the work is
W = P∆V
In isobaric processes, what is constant?
Pressure
The change in internal energy, or ∆U is displayed by
Q - W
The second law of thermodynamics states that
As moving from one equilibrium state to another, the ∆S of a system and the environment will either increase or remain unchanged
The equation for ∆S is
∆S = Q / T
