Thermodynamics Flashcards
(34 cards)
The zeroth law of thermodynamics
States that when two bodies are A and B are also in equilibrium with a third body, then b and c are also in equilibrium
What are the three modes of thermal energy transfer?
Conduction, convection, and radiation
Define conduction
The flow of thermal energy through matter from places of higher temperature to places of lower temperature , without the movement of the medium as a whole
What are the three rules for conduction?
In conduction energy must travel from one another
The buddies must be in my contact with each other for conduction to occur
There is no mass movement of the medium
Define convection
Convection is the flow of thermal energy through a fluid by mass movement of the fluid itself
Define radiation
The flow of energy via electromagnetic waves
It’s gonna happen in a vacuum and does not need any medium
What are the three types of two and expansion and who do they belong to?
Linear expansion solids
Area expansion solids
Volume expansion, solid, liquid and gas
What happens to kinetic energy of molecules when temperature increases
Kinetic energy increases
Define temperature
The measure of average kinetic energy of the particles in a sample of matter
What is the change in kinetic energy of atoms or molecules referred to as
The change in internal energy
Or the change in temp
What is the internal energy of a system and what is the denoted by?
The internal energy U is the sum of all the energy of all the molecules in the system
What is the internal energy formula?
Δ U = Δ Eke + Δ Epe
Kinetic energy is associated with changing internal energy and change in temperature, but not change in state
potential energy is associated with change in internal energy and state not temperature
Define specific heat capacity
The energy ,Q, required to change the temperature of a unit mass of a material by 1 C
Specifically capacity formula
Q=McΔT Jkg-1K-1
Q=Mc Δ θ Jkg-1C-1
When is Mass
Which one is specific heat capacity related to kinetic energy or potential energy?
Kinetic energy because it is with a change in temperature
What is latent heat capacity?
Latent heat capacity is the energy Q required to change state of matter of a unit mass of material
Latent Heat Capacity equation for solid to liquid or vice versa and its name
Latent heat of fusion
Q= MLբ Jkg-1
where m is mass
L is latent
f is for fusion
Latent Heat Capacity equation for liquid to gas or vice versa and its name
Latent heat of vaporisation
Q= MLᵥ
Jkg-1
where m is mass
L is latent capacity
V is for vaporistation
Heat Capacity
C=ΔQ/ΔT
Heat Energy over change in temp
Specific Heat Capacity
C=ΔQ/mΔT
heat energy over mass by change in temp
Sublimation
Ice to vapour
Deposition
Vapor to Ice
Condensation
Gas to solid
Evaporation
Liquid to gas
