Properties of Matter Flashcards
Using Kinetic Theory explain what happens to the pressure if you increase the temperature of a fixed mass gas in a fixed volume container?
- Pressure is caused by the force of particles hitting the sides of the container.
- The temperature is increased. The particles gain kinetic energy.
- They will move faster and so hit the sides of the container more often and with a greater velocity and so greater force.
- So the pressure increases.
A temperature - time graph is shown below. What is happening at point D on the graph?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/463/548/792/q_image_thumb.gif?1502903793)
- The material is changing state
- From a liquid to a gas.
These two block of wood have identical mass. Explain which exerts the greatest pressure.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/463/548/794/q_image_thumb.png?1502903782)
- Both blocks have the same mass, so as W=mg will exert the same force down on the surface.
- Block B is sitting so that a small area sits on the surface, so as P = F/A it will exert a larger pressure.
A temperature - time graph is shown below. What is happening at point E on the graph?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/463/548/797/q_image_thumb.gif?1502903796)
The temperature of the gas is increasing.
What is specific heat capacity?
The number of Joules of energy needed to raise 1kg of a substance by 1OC.
Using Kinetic Theory explain what happens to the pressure if you decrease the volume of a fixed mass gas at a constant temperature?
- Pressure is caused by the force of particles hitting the sides of the container.
- The volume is decreased. The particles have less room to move about and so hit the sides of the container more often creating a larger force.
- So the pressure increases.
What is latent heat of fusion?
The number of Joules of energy required to change 1kg of a solid to 1kg of a liquid with no temperature change.
Describe an experiment to investigate the relationship between the the pressure and the volume of a fixed mass of gas, at a constant temperature.
Boyles Law:
- Pump is used to put pressure on oil which puts pressure on a fixed mass of trapped gas.
- Valve is closed.
- Volume of air column is read off the scale.
- Pressure is read off the bourdon gauge.
- Valve is opened and closed to change the pressure to get a set of readings.
- Draw graph of pressure against volume.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/463/548/802/a_image_thumb.png?1502905533)
How can you convert between OC (degrees Celsius) and K (Kelvin)?
Temperature in degrees Celsius + 273
What is conservation of energy?
Energy cannot be created or destroyed it can only be transferred from one type to another.
A temperature - time graph is shown below. What is happening at point A on the graph?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/463/548/806/q_image_thumb.gif?1502903795)
The temperature of the solid material is rising.
The graph below shows a temperature - time graph. Points B and D show changes in state. Explain why this can be identified from the graph.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/463/548/808/q_image_thumb.gif?1502903797)
When a substance changes state the temperature remains constant. (Shown by horizontal line on graph)
Explain how snow shoes prevent you sinking into the snow.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/463/548/810/q_image_thumb.jpg?1502903782)
Snow shoes have a large area. So the force of the person (weight) is spread over a larger area so the pressure exterted on the snow is less as P = F/A
What is meant by pressure?
The force per unit area
A temperature - time graph is shown below. What is happening at point C on the graph?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/463/548/813/q_image_thumb.gif?1502903796)
The temperature of the liquid is increasing.