# P6

What is density defined as?
Its mass per unit volume
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What is the equation for density?
*
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How to measure the mass of an object?
Use an electronic balance
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How to find the volume of a regular solid?
Measure its dimensions
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How to work out the volume of an irregular solid?
Lower it into a measuring cylinder and the rise in water level is the volume
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How to calculate the mass of water?
Measure the mass of an empty beaker and then measure the mass of both and take mass of cylinder from total
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What is the density of a solid?
Much higher than a gas
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What is the density of a liquid?
Much higher than a gas
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What is the density of a gas?
Lower than a solid or a liquid
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What is the energy transferred to a substance celled when it changes state?
Latent heat
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Where can you identify on a graph where latent heat is being transferred?*
Where the temperature doesn't change
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What is the energy stored by the particles of a substance called?
Internal energy
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What is internal energy made up of?
Kinetic energy and potential energy
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What does internal energy not include?
GPE and kinetic energy caused by motion of whole substance
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What is the pressure of a gas caused by?
The force of impacts of the gas particles with the surface
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What happens when a gas is heated?
The particles gain energy, move faster, more collisions so pressure increases
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What is the specific latent heat of fusion?
The energy needed to change the state of 1KG of the substance from solid to liquid.
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What is the specific latent heat of vaporisation?
The energy needed to change the state of 1kg of the substance from a liquid to a gas
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What are smoke molecules like compared to air molecules?
Much larger
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What is the unpredictable motion of smoke particles evidence for?
Random motions of gas molecules
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What happens to the volume of a fixed mass at a constant temperature when the pressure is increased?
Its pressure is increased if volume is decreased,
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Why can the temperature of a gas increase if it compressed rapidly?
Because work is done on it and the energy isn't transferred quick enough to its surroundings
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## Other cards in this set

### Card 2

#### Front

What is the equation for density?

*

### Card 3

#### Front

How to measure the mass of an object?

### Card 4

#### Front

How to find the volume of a regular solid?

### Card 5

#### Front

How to work out the volume of an irregular solid?