Patanol vs Alaway (Ketotifen Fumarate) Eye Drops

In July of 2010, I wrote a piece on my experience with Medco getting my prescription for Patanol filled. The medication is a prescription antihistamine that is administered by drops to the eye.  It is prescribed for hay fever and similar allergies that cause itchy eyes.

Spontaneous Change and Equilibrium

This post is part of a series, Nonsense and the Second Law of Thermodynamics. The previous post is entitled Free Energy.

Diamond turns spontaneously into graphite; yet we may have to wait longer than the lifetime of the universe to see such a change.  Hydrocarbons are spontaneously oxidized into carbon dioxide and water; yet gasoline requires a source of heat before it burns.

The Holocaust History Project: Pamphlet on David Irving

The Holocaust History Project Blog of The Holocaust History Project has announced an updated pamphlet on Holocaust denier David Irving.

The British court found that Irving's

misrepresentation of history was

"deliberate in the sense that he was motivated by a

desire borne of his own ideological beliefs to

present Hitler in a favourable light."

Free Energy

This post is part of a series,Nonsense and the Second Law of Thermodynamics. The previous post is entitled Entropy as Religious, Spiritual or Self-Help Metaphor.

You cannot get something for nothing, and the term "free energy" does not mean energy that has no cost.  Rather it refers to energy that is available to do something useful.  The use of the word "free" is in the sense of "liberated."  Free energy is energy that can be liberated to do something useful.

We know that the second law places limitations on how much energy can be used to do useful work.  In most situations, some of the energy must be dissipated as heat that cannot be used to do something useful.  The portion of the energy that can do something useful is the free energy.

At constant volume, the free energy is the Helmholtz Free Energy, given the variable A.

Enthalpy

This post continues a tangent  from my series on the second law of thermodynamics.  It discusses another quantity in thermodynamics, but it is necessary before I can get to the next post in the series, which is on free energy.

This post discusses the term enthalpy.

At constant pressure the change in enthalpy is the heat transferred to a system.

      ΔH = q  at constant pressure.

Heat is not a state function, but enthalpy is.

Site Redesign

Frequent visitors may have noticed that I've redesigned the site. An unfortunate consequence is that two of the polls were lost; I've recreated them but lost the votes to date.

Second Law Poll

The purpose of this post is to document the final results of a poll on the site.  I do not intend to comment on the results until I conclude my series on the second law of thermodynamics.  It is worth noting at this point that there is no clear consensus on the correct answer from respondents.

 I think that this fact is reflective of the state of confusion that exists in public discourse regarding the second law of thermodynamics.

The poll asked the respondents to pick an option to complete the statement:  "The second law of thermodynamics states:"

The option were:

• The disorder of the universe must increase.
• You can't win.
• The entropy of an isolated system must stay the same or increase.
• The entropy of a closed system must stay the same or increase.
• Heat cannot be transferred from a cold body to a hot body.
• The entropy of the world must increase.
• Let's keep score.

The results are shown in the following figure with truncated responses: