Solids, Liquids and Gases Flashcards
(17 cards)
1
Q
Practical: investigate the density of an object
A
- measure mass of object on balance
- pour water into measuring cyclinder and record initial volume
- Place object in water, ensure that it is submerged and record final volume
- Volume of object = final volume - initial volume
- Use the fomula Density = mass/volume
2
Q
solid
A
- regular arrangement
- arranged in rows
- particles touching
- vibrations
3
Q
Liquid
A
- irregular arrangement
- particles touching
- slide over each other
4
Q
Gas
A
- Random arrangement
- Particles spaced out
- Bounce off of surface and each other
5
Q
Practical: Obtain a temperature-time graph
A
- PLace ice cubes in beaker
- Insert themometer into ice
- Start recording the temperature every minute
- Stop recording when a constant temperature reached
- then heat the water until a constant temperature reached
- continue to record temp each minute
6
Q
straight line on a temperature-time graph shows….
A
changes in state
7
Q
Specific Heat Capacity
A
The amount of energy required to heat 1kg of mass by 1 degree celcius
8
Q
Change in thermal Energy =
A
m x C x ΔT
9
Q
Practical: Investigate the specific heat capacity of water
A
- Measure the mass of water (mass of water + beaker - mass of beaker)
- Measure the inital temperature of water using a themometer
- Turn on the heater and start the stopwatch
- Measure voltage using a voltmeter and current using and ammeter
- Turn off heater and stop the stopwatch
- Measure final temperature
- Calculate temperature change = final - intial
- Calculate Energy = current x voltage x time
- SHC = Energy/(mass x temp change)
10
Q
Absolute Zero
A
the lowest temperature a state can reach
11
Q
0 Kelvin
A
- 273°C
12
Q
Kelvin to Degrees
A
-273°C
13
Q
Degrees to kelvin
A
+273
14
Q
Effect of increasing temperature of a gas on pressure
A
- Increasing temperature, Increases kinetic energy
- Particles collide more frequently
- Particles collide with sides of container more
- Exerts a force on walls of container
- Force exerted on a given area = pressure
15
Q
Brownians Motion
A
- pollen grains are suspended in water
- observed under a microscope that they move in random directions
- movement is caused by collisions from lighter, faster particles surrounding them
16
Q
Volume increases….
A
Pressure Decreases
17
Q
Temperature increases….
A
Pressure increases
