P3 - Particle Model Of Matter

Question 1

Colliding gas particles to create pressure

Answer 1

• particles in gases are free to move around
• when they collide they exert a force on it
• the outward gas pressure is the total force exerted by all of the particles in the gas on a unit area of the container walls

Question 2

Increasing temperature of a gas to increase its pressure

Answer 2

• increase the temperature of a gas and transfer energy into the kinetic energy stores of its particles
• the higher the temperature, the higher the average speed of the particles

Question 3

Density equation

Answer 3

density = mass / volume

Question 4

density of a solid practical

Answer 4

• use a balance to measure its mass
  regular solid
• measure its length,width and height then calculate its volume
  irregular solid
• submerge it in a eureka can filled with water
• the water displaced will be transferred to the measuring cylinder
• volume in the measuring cylinder after the object is taken out is the volume.

Question 5

Specific Latent Heat

Answer 5

the amount of energy needed to change 1kg of it from one state to another without changing its temperature.

Question 6

SLH Equation

Answer 6

Energy = Mass x Specific Latent heat