Thermodynamics Flashcards
thermodynamics deals with —— systems
macroscopic
what are constant in macroscopic system
pressure and temp
what is systme and surrouding
systme-observig part and surrounding- rest of the universe
what is state
measurable quantities whose valus does not depend on how it is reached(photo of the process can be explaines by stae variable
what is internal energy and what is dependent on
total energy (mechanical,electrical,heat) and is dependent on temperature
name the state functions
internal energy,pressure,volume,temp,
in adiabatic cond, internal energy is
the work done (can be electrical,mecahnical any form of work)
at isochoric process heat is converted to
change in intenal energy
sign conventions
on - +ve
by-[ -ve
in isolated sytem internal enrgy is
zero because work and het is zero
first law of thermodynamics
in isolated sytem energy is constant
what is reversible process
when infitismely small changes id brought to the system, intismely small,series of equilibrium steps,
work done is reversible process
-2.303nrtlog(v2/v1)
what is free expansion
no work ,vacuum, and heat is internal energy
heat in isothermal free expansion reversible
2.303nrtlog(v2/v1) {(-w)}
what is enthalpy
heat at const pressure,change in internal energy at constant volume
equation of enthalpy
only for gases becaus evlouem
extensive property
An extensive property is a
property whose value depends on the quantity
or size of matter present in the system
intensive
Those properties which do not depend
on the quantity or size of matter present
are known as intensive properties.
what is heat capacity
measure of how much heat is tranferred
