Module 3 Part 5: Thermodynamics Flashcards
what the equation of the internal energy of a substance
Kinetic energy + Potential energy
what is the symbol of internal energy
U
what is the first law of thermodynamics
the change of internal energy is equal to the energy added or removed through heating/cooling minus work done by the system
what is the equation of the first law of thermodynamics
ΔU = Q - W
what is the symbol for heat energy
Q
what is the symbol for work
W
what is temperature
the measure of the average kinetic energy of the particles in a substance
what is the unit for thermal energy
joules (J)
what is law of thermal equilibrium
when two objects are in contact the thermal energy of the higher temperature object will be transferred to the cooler object until they reach the same temperature
what is the equation for changing temperature
Q = mcΔT
what is the symbol for mass
m
what is the symbol of specific heat capacity
c
what is the symbol for temperature
T
what is temperature measured in
Kelvin (K)
what is mass measured in
kg
what is specific heat capacity
the amount of energy required to change the temperature of 1 kg of a substance by 1 K
what happens when the temperature of a substance plateaus on a graph
the state of the substance is changing
why does energy plateau when changing states
the energy goes towards changing the arrangement of particles rather than increase average kinetic energy
what is latent heat
the energy required to change the arrangement of particles within a substance when changing state
what is specific latent heat of fusion
the energy required to change 1kg of a substance from from solid to liquid
what is specific latent heat of vaporisation
the energy required to change 1kg of a substance from from liquid to gas
what is the symbol for latent heat
L
what is the equation for heat energy with latent heat
Q = mL
