Patricle Model Of Matter Flashcards
What is the equation for density? + what is the unit? - PMOM
Density = Mass Unit = Kg/M^2 or g/cm^2
Describe the arrangement of particles in a solid - PMOM
Particles are tightly packed in a regular structure and aren’t free to move
Describe the arrangement of particles in a liquid - PMOM
Particles are tightly packed together but are free to move around
Describe the arrangement of particles in a gas - PMOM
Particles are spread out and move randomly
How do you find the volume of an irregular shape? - PMOM
Fill a displacement can with water until it runs out of the spout. Find a container for the spout to run into. Place your object in the can. The volume of water that exits the can is the same as the volume of the object
What is sublimation? - PMOM
Heating a solid with similar melting and boiling points that goes from solid > gas
What is condensing? - PMOM
Cooling a gas, meaning it goes from gas > solid
What happens when a material is heated/cooled? (Name both) - PMOM
Chemical bonds may form, break or weaken
The material will lose/gain thermal energy as the particles within it lose/gain speed
What is the law of the conservation of energy? - PMOM
Presuming no energy is lost to the environment, any energy transferred to a material is distributed in its energy stores
What is Specific Heat Capacity? - PMOM
Specific heat capacity is the amount of energy required to change 1 Kg of a substance by 1°C without a change in temperature
What is the equation for Specific Heat Capacity?
Specific Heat Capacity = Change in thermal energy/Mass/Temperature change
What is Specific Latent Heat? - PMOM
The amount of energy required to change the state of 1 Kg of a material without changing temperature
What is the equation for Specific Latent Heat? - PMOM
Specific Latent Heat = Change in thermal energy / mass
What is happening at the horizontal areas of a heating/cooling curve? - PMOM
The bonds of a substance are being broken, rather than increasing the speed of particles
What does a longer horizontal line mean on a heating/cooling curve? - PMOM
The longer the line, the more energy is required to break bonds between particles
Describe the movement of particles in a gas - PMOM
Gas particles move very quickly in random directions
What is gas pressure? - PMOM
Collisions between particles of a gas when in a particular area
What measures cause gas pressure to increase? - PMOM
By either increasing the temperature of the container or decreasing the area of the container
Explain how both measures of increasing gas pressure work - PMOM
Increasing temperature supplies the particles with more kinetic energy, causing more collisions between particles
By decreasing the area of the container, more collisions occur
What is the equation for pressure? - PMOM
Pressure = force/area
AREA IN METRES SQUARED
Describe the relationship between pressure and temperature - PMOM
The relationship between pressure and temperature is directly proportional
What does pV = Constant mean? (BOYLE’S LAW) - PMOM
When pressure increases, volume decreases (AND VICE VERSA)
What does p1V1 = p2V2 mean? - PMOM
Both pressures and volumes in different containers are proportional to one another
Why does force being applied to gas particles result in an energy transfer? - PMOM
By applying force through a
piston and moving the particles when decreasing volume, work is done
