P3/Matter Flashcards
what is the equation for density?
density= mass/volume
why are changes of state physical changes?
the material recovers its original properties if the change is reserved
what happens to the mass of material when it changes state?
the mass is conserved
what is internal energy?
the total kinetic and potential energy of all the particles that make up a system
what is specific heat capacity?
the amount of energy required to raise the temperature of one kilogram of the substance by one degree celsius
what is specific latent?
the amount of energy required to change the state of one kilogram of a substance with no change in temperature
what is the specific heat of fusion?
the amount of energy required to change the state from a solid to liquid without changing the temperature
what is the specific heat of vaporisation?
the amount of energy required to change the state from a liquid to vapour without changing in temperature
how do the molecules in a gas move?
in a constant random motion with varying speeds and directions
how is the motion of gas molecules related to pressure and temperature?
changing the temperature of a gas held a constant volume, changes the pressure exerted by the gas
what is the relationship between pressure and volume for gas held at a constant temperature?
pressure x volume = constant
how does doing work on a gas affect the internal energy and temperature?
doing work on a gas will increase the internal energy of the gas and can cause an increase in the temperature of the gas
