density

Created by

jay sharma

Cards (20)

what is the definition of density
the mass per unit volume of material
what is the equation for density
density = mass/volume mass= kg volume = meters cubed
what is meant by a state of matter
a form in which matter can exist , based on the particle arrangement in a substance
state the different states of matter in order from most to least dense
solid , liquid , gas
use the kinetic theory to explain the structure of liquids
the particles have some kinetic energy , they are free to move and can move in random directions at very low speeds
explain the movement of particles in a solid
the particles virbate around a fixed position as they dont have enough kinetic energy to break the bonds and move freely
describe the arrangement of particles in a gas
particles in a gas almost have no forces between them therefore they are completely free to move and move in random directions at high speeds
what is always conserved when a substance undergoes a change of state
mass
how does a change of state differ from a chemical change
in a change of state , the material can return to having its previous properties if the change is reversed
what is the internal energy of a substance
the energy stored by the particles , the sum of the total kinetic and potential energies that make up the system
what 2 things can heating a substance do
raise its temperature , change the state of a substance
what three factors determine the temperature change of a system
mass of substance being heated , type of material , energy inputted into system
what is sublimation 
when a solid turns directly into mass
what is the difference between chemical and physical changes
physical changes can be reversed , chemical changes cannot be easily reversed
how does heatig a cause a substance to change shape
heating matter gives particles more potential energy , this energy is used to break the bonds of attraction , leading to a change of state
why does heating increase the temperature of a substance
it increases the amount of thermal energy in a substance , it also gives the particles more kinetic energy , meaning that they move faster and the temperature increases
state the equation used to calculate the energy change when a substance is heated
change in energy = mass x change in temperature x specific heat capacity , joules , kilograms , celsius
define specific heat capacity
the amount of energy needed to increase the temperature of 1kg of a substance by 1 degrees
define specific latent heat
the amount of energy needed to change the state of 1kg of a substance with no change in temperature
state the equation for the energy required to chang the state
energy = mass x specific latent heat