Particle Model of Matter Flashcards
How do you work out internal energy?
Internal energy = kinetic energy + potential energy
Give 3 ways to check if a physical change has occured
The reaction is reversible
The mass of the products = the mass of the reactants
(mass is conserved)
No new substances have been formed
Displacement method
Measure the volume of the displaced water.
What is specific Latent heat of FUSION
SOLID —> Liquid
What is specific Latent heat of EVAPORATION
Liquid —> Gas
suggest why it is better to calculate the specific heat capacity at a change of temperature of 80degrees instead of 50degrees
largest possible range reduces percentage error
heating a substance increases its
INTERNAL ENEGERY!
the total potential energy of molecules in hot water
is the same as the total potential energy of molecules in cold water
compare the specific heat capacity of hot water with cold water
the specific heat capacity for hot water is the SAME as for cold water
describe how the arrangement of particles in a gas is different from that in a solid
solid: arranged in a regular pattern
gas: moving in random direction
how can we observe a physical change
reaction is reversible
