Physics Particle Model March 2018 Flashcards
Pressure is directly proportion to what?
Temperature
Pressure is inversely proportional to what?
Volume
Particles of gas don’t lose …. when colliding into objects and other particles.
Kinetic Energy (KE)
What is the definition of Latent Heat?
Latent Heat of Fusion = The energy required to change 1 kg of a substance from a solid to a liquid at the same temperature.
Latent Heat of Vapourisation = The energy required to change 1 kg of a substance from a liquid to a gas at the same temperature.
What is the equation for Latent Heat?
E = mL
What are the tree states of matter?
Solid, Liquid, Gas
In a Solid particles only …………… .
Vibrate
In a liquid and gas the particles are ……… to move
Free
Explain the speed of particles in solids, liquids and gases
In solids the particles vibrate slowly, liquids move at a medium pace and gases move at high speeds.
Explain the spacing of particles in solids, liquids and gases
In solids the particles are close together, liquids are slightly further apart and gases have a large space between them.
What is the definition of internal energy?
The sum of the total KE and PE of all the particles.
When a substance is a solid, liquid or gas, does the KE or PE increase?
KE
If a substance is freezing or condensing, does the PE increase or decrease?
Decrease
When a substance is a melting or boiling, does the KE or PE increase?
PE
What is the definition of density?
Density is how mass is concentrated in a given volume.
What is the equation for density?
Density = mass/volume
What are the units for density?
Small objects : g/cm^3
Large objects : Kg/m^3
How do you find the volume of a cube?
Height x width x length
How do you find the volume of a trapezium?
(a + b) x h
________ x length
2
How do you find the volume of an irregular shape?
Pour what in a measuring cylinder (record ml 1). Then place the irregular object in the water (record ml 2). Now do ml 2 - ml 1. The number will be the volume but in ml. To convert it into cm^3 use this: 1 ml = 1 cm^3
What is the definition for Specific Heat Capacity?
The energy needed to raise 1 Kg of any substance by 1 degree C.
What is the equation for SHC?
E = mcΔθ
Δθ = change in temperature
