Module 12 Flashcards
- Has a large number of identical molecules
- Volume occupied by the molecules is negligible
- Molecules obey Newtonβs Laws of Motion
- Molecules move in a random manner
- Collisions between molecules are perfectly elastic
Ideal Gas
Defined in chemistry as amount of substance
MOLE (πππ)
Number of particles within one measured mole
AVOGADROβS NUMBER (π΅π¨)
Measured mass of exactly one mole
MOLAR MASS (π΄πππ)
Proportionality constant relating energy to temperature
IDEAL GAS CONSTANT (πΉ)
What is the ideal gas constant equal to?
π = 8.314 π½βπππ β πΎ
Constant relating kinetic energy to temperature
BOLTZMANN CONSTANT (π)
What is the boltzmann constant equal to?
π = 1.38 Γ 10 ^β23 π½βπΎ
Occurs at constant pressure
Isobaric Process
Occurs at constant volume
Isochoric Process
- Occurs at a constant temperature
- Internal energy of a system remains unchanged
Isothermal Process
- Work without energy transfer
- No heat involved
- Work without energy transfer
- No heat involved
The ideal gas in the system absorbs qin , from a heat source at a high temperature (Th), expanding and doing work on the surroundings.
Reversible isothermal gas expansion process
The system is insulated. The gas continues to expand and do work on surroundings, making the system cool down to a lower temperature, Tc.
Reversible adiabatic gas expansion process
The surroundings do work to the gas at Tc, and causes a loss of heat, qout.
Reversible isothermal gas compression process
The system is insulated once more. Surroundings continue to do work to the gas, which causes the temperature to rise back to Th.
Reversible adiabatic gas compression process
