Ideal Gas
Q. What is an ideal gas?
An ideal gas is one that can be considered to obey the principle that the product of the pressure and volume of the gas will be proportional to its temperature.
Q. What are the key assumptions in the kinetic theory of gases?
- There are a large number of molecules in random, rapid motion.
- Particles have a negligible volume compared to the total volume of the gas.
- All collisions are perfectly elastic.
- The time taken for a collision is negligible compared to the time between collisions.
- Between collisions there are no forces between particles.
Q. Explain how increasing the temperature of a balloon, while keeping the volume the same, will increase the pressure on the gas.
As the temperature increases, the average kinetic energy of particles increases, so the particles travel at a higher speed. This results in more frequent collisions. Which would cause an increased rate of change of momentum. Which means the particles would exert a greater force. Therefore the pressure in increased.
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