Entropy Flashcards
What is Entropy
A measure of how spread out or how dispersed the systems ENERGY is
What does W=X^N signify
The number of possible arrangements for molecules
What is Ssys = S(final)-S(initial)
The change in entropy of a system
What is the equation: ∆Ssys = nR× ln Vfinal/Vinitial used for
Change in entropy, used for isothermal expansion or compression of an ideal gas
Why is ∆Ssys = nR× ln Vfinal/Vinitial not used often
It is difficult to calculate W
What is W
possible arrangements of molecules
Define Standard Entropy S^o
The absolute entropy of a system at 1 atm
Which has a greater entropy, a liquid or a gas phase
Gas phase:
More possible W and gas occupies a greater volume
Which h as a greater entropy, a solid or liquid phase
Liquid phase
What is a monatomic species
An element that consists of a single atom
the noble gases
For two substances in the same phase, and with similar molar masses, which substance has the greater standard entropy
The substance with more complex molecular structure
For two monatomic species, which one has the higher entropy
The one with the greater molar mass
In cases where an element exists in two or more allotropic forms, which form has the greatest entropy
The form in which the atoms are more mobile
What is ∆S^orxn = S^o(products) – S^o(reactnats)
The change in entropy of a system
if Delta H is positive
endothermic reaction
