p3- The particle model and motion in Gas Flashcards
1
Q
-What are the characteristics of a solid
A
- Strong forces of attraction hold together
- Fixed regular arrangement
- Don’t have much energy
- Vibrate
2
Q
What is all matter made from
A
Particles
3
Q
- What are the characteristics of a liquid
A
- Weaker forces of attraction
- Close together but can move past each other
- Held in irregular pattern
- More energy than solid and move in random directions at low speeds
4
Q
- What are the characteristics of a gas
A
- Gasses almost gave no forces of attraction
- High energy
- Free to move
- Random directions and speeds
5
Q
- What creates pressure
A
- Colliding gas particles
- Free to move around as they collide
- When the collide they exert a force
- Pressure os the force exerted per unit area
- So in sealed container gas pressure is total force exerted by all of the particles in the gas on a unit area of walls
6
Q
What effect does temperature have on pressure
A
- IF you increase temperature of a gas you transfer the energy into kinetic stores
- The temp of a gas related to average energy in kinetic stores. Higher temp means higher average energy
- As you increase the temp the average booed increases
- At a constant volume increasing temperature increases pressure
7
Q
-Why does increase in energy lead to increase collisions
A
- They move quicker,a s they have more energy, collisions will taken place more often
- They have larger momentum, means they exert larger force when the collide
8
Q
- What is density
A
- Density is a measure of compactness of a substance
- Mass of substance to how much space it takes up
9
Q
- How can particle model be used to explain density
A
- Density depends on what its made of and how particles are arranged
- A dense material has particle shingly compacted, less dense if further away
- This means that density changes between states of matter
10
Q
- Who do you find the density of a solid object
A
- Balance to measure its mass
- IF regular solid find volume
- IF irregular you can use Eureka can and find area of water removed
- Divide mass by volume
11
Q
- how do you ion volume of a liquid
A
- Place a measuring cylinder on balance at 0
- Pour 10ml of liquid in and see mass
- Pour another 10ml and record mass again- repeat
- For each measurement use formula
- Take average
12
Q
What effect does vibration or moving around havve
A
- Increase kinetic energy stores
13
Q
- What is internal energy
A
- total energy that its particles have in kinetic and potential energy stores
14
Q
- What effect does heating have on internal energy
A
- Increases as transfer energy
15
Q
- What does temperature change depend on
A
- Mass- specific heat capacity
- Energy input
