THERMAL PHYSICS P2 Flashcards
Different States Of Water
Ice
Water
Steam
Ice
Molecules Close Together
Molecules Vibrate In Fixed Position
Strong Intermolecular Forces b/w Molecules
Water
Molecules Close Together
Molecules slide Past Eachother
Intermolecular Forces b/w Molecules Are Weaker Than In Ice, Stronger In Steam
Steam
Molecules Far Apart
Molecules Able To Move Freely
Almost No Intermolecular Forces b\w Molecules
More Energy The Molecules Have
The Higher Their Temp
Which State’s Molecules Have Least Kinetic Energy
Solid
Which State’s Molecules Have Most Kinetic Energy
Steam
Latent Heat Of Vapourisation
Energy Required To Boil (Vapourise) 1Kg Of Water Called Specific Latent Heat Of Vapourisation
Latent Heat Of Vaporisation Equasion
Q = 🔼mL
What is Q in Q=🔼mL
Energy Transferred
What Is 🔼m in Q=🔼mL
Mass Of Water That Has Been Vapourised
What Is L In Q=🔼mL
Specific Latent Heat Of Vaporisation Of Water
Specific Heat Capacity
Q=mc🔼T
Q In Q=mc🔼T
Energy Transferred To Water ( J )
m in Q=mc🔼T
Mass Of Water Heated (Kg)
c In Q=mc🔼T
Specific Heat Capacity Of Water (4200 J Kg-1 K-1)
🔼T In Q=mc🔼T
Temperature Change (K)
An Object Is Heated Reaches Thermal Equilibrium When:
Energy Flowing Into Object = Energy Flowing Out Of Object
Temp Stops Increasing & Reaches A Maximum
When Object Heated, Temp Increases. thermal Capacity Of Object Is:
Amount Of Thermal Energy Required To…
Increase Temp Of Object By 1K
Solid gas
Mol held together by strong IMF
Gain energy & Vibrating more as temp of ice ⬆️
Melting
Energy of mol stay contact
Energy transferred to ice used break IMF attraction & turn solid ice into liq water
Liquid water
IMF weaker than Q&P
Mol Able To slide around together
Mol gain kinetic energy & move fast as temp ⬆️
Boiling
Energy of mol stay constant
Energy transferred to water used to break IMF of Attraction
Turn liq water into gaseous steam
Gaseous stream
IMF weaker
Mol move freely
Mol gain kinetic energy & move fast as temp ⬆️
