Thermodynamics Part 1 Chemistry^3 Mindmap
- Created by: Strelly22
- Created on: 19-12-22 13:24
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- Thermodynamics - Part 1
- Using the ideal gas equation
- SATP = 298.15K and 1 bar
- molar volume of an ideal gas = 24.8 dm^3 mol^-1
- Kinetic molecular theory and the gas laws
- assumptions:
- gas molecules have negligible size
- collisions are elastic so there is no energy loss
- the molecules don't interact with each other
- assumptions:
- The speed of molecules in a gas
- gas molecules move at high speeds that depend on temperature and molar mass
- maxwell-boltzmann distributions = distribution of molecular speeds
- max value in a curve represents most probable value of the speed
- characteristic properties of a gas
- collision cross section = target area for another molecule to collide with
- collision frequency = mean number of collisions per second
- mean free path = mean distance travelled between collisions
- gas molecules at atmospheric pressure undergo collisions at rate of 1x10^10 s^-1
- Real gases
- ideal gas equation describes experimental behaviour well at low pressure and high temps but deviates at high pressure and low temps
- more realistic equation is van der waals equation
- Using the ideal gas equation
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