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P3 Revision - Coggle Diagram
P3 Revision
Pressure in Gasses
A gas' pressure can be altered by a change in temperature, a change in the volume of the contained or a change in the number of particles present within the container.
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As the temperature of a gas increases, so does the internal energy stored by gas particles, this causes the particles to move much faster and collide with each other and the walls of the container more often. The more collisions that occur with the particles and the walls, the more force is exerted on the walls. Because the area of the wall is constant and P = F / A, when force increases, so does the pressure.
Density
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Required Practical 5
To find the density of an irregular shaped object, its mass must first be found using an electric balance. Then, a eureka filled with water will be used to find the amount of water that the object will displace; the object will be lowered carefully into the can, the volume of water that it displaces is the volume of the object. Then, the equation ρ = m / V will be used to calculate the objects density.
Internal Energy
Internal energy is the amount of energy stores within a system, in its particles
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When a change of state occurs, the energy supplied changes the energy stored (internal energy) but not the temperature.
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Changes of State
When an object changes state, its mass is conserved because the amount of particles within the substance does not change
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