Solids, Liquids, Gases Flashcards
Equation: density =
density = mass/volume
Equation: Pressure =
pressure = force/area in Pascals or N/m2
Equation: Pressure in a liquid =
pressure in a liquid = depth x density x gravity
p = hpg
Pressure at any point in a liquid or a gas acts …..
equally in all directions
Pressure in a gas is caused by ….
particles in the gas colliding with the sides of a container or an object in the gas
Describe how to find the density of a regular object
with a ruler measure width, depth, height
volume = wxdxh
with a mass balance measure mass
density = m/V
Desribe how to find the denity of an irregular object
using a dsiplacement can
overfill can and leave on flat surface to drain excess water.
carefully lower object into can until emmersed and catch displaced water in measuring cyclinder
volume of water = volume of object
with a mass balance measure mass of object
Equation for specific heat capacity: Q =
Q = mc /\ T
Define specific heat capacity c
SHC is the energy required to increase the temperature of 1kg of substance by 1 degree
Describe the arrangement and motion of particles in a solid
regular arrangement
closely packed
vibrate in fixed positions
strong forces
Describe the arrangement and motion of particles in a liquid
irregular arrangment
closely packed
particles can move past each other
forces less strong than solids
Describe the arrangement and motion of particles in a gas
free fast random motion
far apart
weak forces
Describe the motion of molecules in a gas and why they exert a pressure
Particles have random motion
They exert a force on the walls of a container and hence a pressure
What is Absolute zero temperature in Kelvin and degrees C?
0K
-273 oC
To convert degrees C to Kelvin ……
add 273
0 deg C = 273K
