Excess Flashcards
A phase transition is not always ____ or at ____. this is only at the __ ____
reversible, at equilibrium, boundary line
The internal energy of a system is related to the degrees of freedom by the equation ____
f = f/2 nRT
When pressure approaches 0, the gasses behave ideally because the ___ of the molecules become negligable in comparison to the container, and the ___ ___ approach zero
volume, intermolecular forces
The larger the a value, the ___ the intermolecular forces
stronger
In the virial equation, at ___ temperatures, attractive forces dominate, while at ___ temperatures, repulsive forces dominate
low, high
The van der waals equation become inaccurate at ___ temperatures
high
As more steps are added to gradually make a process reversible, the gas needs to do ___ work in expansion, while the surroundings do ____ work in re-compression. This is why w(irreversible) ____ w(reversible)
more, less, >
a spontaneous process in an isolated system will _____ its entropy to a maximum at ____, then entropy is ____
increase, equilibrium, constant
As temperature approaches ___K, ____ approaches 0
0, Cp
entropy represents the extent to which energy is _____ so it becomes ____ able to do work
dissipated, less
For enthalpy and entropy to be independent of T, ____ must equal to ___
change in Cp, 0
In a multiphase system at constant T and P, the stable phase is that of the lowest ___
G
The C-C equation defines a _____ ____ ____ on a pressure vs t diagram
phase boundary line
the slope of the boundary line is given by _____ or _____
change in S/ change in V, change in H over T (change in V)
The standard gibbs free energy only refers to the ___ of the _____, not the ___
position, equilibrium, sponteneity
The ___ of a reaction remains the same even when more product or reactant is added.
K
When the temperature of a system decreases, the ___ ____ ___ is smaller
average molecular speed
A ___ pressure means _____ density
higher, greater
Linear molecules have _____ degrees of rotational freedom, while non linear molecules have _____ degrees of rotational freedom. All molecules have _____ translational degrees of freedom
2, 3, 3
When all things are in their standard states, ____ and ____
q = 1, G(naught) = G
In an insulated / isolated system, q = ___, and w = ___.
0, 0I
In a rigid container, ____ is not changing
volume
