7.05.21 Flashcards
(15 cards)
describe the motion and arrangement and particles in a solid
regular arrangement
describe the motion and arrangement of particles in a liquid
all touching and they are all around each other
describe the motion and arrangement of particles in a gas
far apart and they are moving around fast
explain why gas is less dense than solids and liquids
they have bigger spaces between particles
how do you tell the difference between a physical change and a chemical change
physical changes are reversible. chemical changes are much harder to reverse
what is the melting point of a substance
point below which a substance is a solid and above which it is a liquid
what is the boiling point of a substance
the temperature above which a substance is a gas and below which it is a liquid
what is internal energy
the total energy of particles in a substance combined
describe the two different types of energy that internal energy is made up of
temperature only goes up when the internal kinetic store is increasing
when you heat a substance, which two processes can occur
internal potential position or internal kinetic movement
define the term specific heat capacity
can never change temperature and change state at the same time
when you heat a substance to change its state, does the temperature change?
no it does not
define the term specific latent heat
the energy required to raise one kg of a substance to change state without changing the temperature
if you increase the temperature of a substance, which type of energy increases?
kinetic energy
explain how the particles in a gas cause pressure
collisions of the particles with the inside wall of the container
