Energy, Uncategorized

Entropy is a useful PROPERTY

BRITISH STANDARD BS ISO 80000-5:2007; Quantities and units — Part 5: Thermodynamics defines entropy as stated below:

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Thermodynamics defines entropy as stated below:

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Entropy has nothing to do with order.

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Entropy has nothing to do with disorderEntropy.jpg

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Entropy has nothing to do with chaos

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Order, disorder, & chaos are not physical quantities. Order, disorder, & chaos can’t be measured. Order, disorder, & chaos cannot be expressed in numbers

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Entropy like Energy is a thermodynamics property

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It takes three steps to prove that Entropy like Energy is a thermodynamics property

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Energy

Jim Al-Khalili mystifies Energy; & Entropy

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When referring to ”Order and Disorder & Energy” link you will get the message below

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& when referring to BBC On iPlayer we get  the message below

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Why? Maybe Jim Al-Khalili agrees with the points raised below & copyright is acting like a Tipp-Ex Shaken & Squeezed  Correction tool.

Finally an absolute gibberish, gobbledygook, nonsense by Jim Al-Khalili the corrupted scientist preaching corrupted science is on YouTube https://goo.gl/FwPKcZ

 

Jim Al-Khalili starts his programme for BBC, ”Order and Disorder & Energy” with his usual breathless enthusiasm & states:

”How did humans acquire the ”power” to transform the planet like this? Looking at the earth at night reveals to us just how successful we have been in harnessing and manipulating energy & how important it is to our existence”

According to system of physical units ( SI units ) Power is defined as:

Do humans actually acquire the ”power”? It sure doesn’t look like it!, when one referrers to the definition of ”Power” in physics; & the definition of the verb ”to acquire”.

Jim goes on with the same breathless enthusiasm & says:

”Energy is vital to us all. We use it to build the structures that surround & protect us. We use it to power our transport, & light our homes; & even more crucially, energy is essential for life itself; without the energy we get from the food we eat; we die; but what exactly is energy? & what make it useful to us?”

Well Jim (Jmaal جمال) energy is a thermodynamics ”property’‘; & in thermodynamics a ”property” is any (macroscopic) ”observable characteristic” of a system; & energy like altitude, pressure, volume, temperature, density, enthalpy, entropy, & internal energy is a useful property used in calculations; for example: The difference: Q W; where Q = Heat & W= Work; or the sum of the kinetic energy & the strain energy for all the molecules; or “the CAPACITY for doing work”

In addition to the above Jim, the 1st Law of thermodynamics & Albert Einstein also make a statement & they say ‘Energy cannot be created or destroyed it can ONLY be CHANGED from one FORM to another’. In this statement there is NO mention of the verb ”to USE”; & if energy is something ”usable” then no doubt the statement would have elaborated on ”usability” of energy.

Jim needs to start thinking about energy demystified .  No energy is not used for ‘building the structures that surround & protect us’. Energy is not used ‘to power our transport’, & or ‘light our homes’; & or ‘even more crucially’, energy is not ‘essential for life itself’ at all & we don’t ‘get’ energy from the food we eat. The ‘chemical energy’ in the food is mainly ‘CHANGED’ to ‘thermal energy’ which stops us dying.

It is the Mechanical Power & not energy which is used for building the structures that surround & protect us; power our transport, & or
light our homes; & even more crucially, essential for life itself, human’s Mechanical Power is the result of change of ‘chemical energy’ in the food to ‘thermal energy’ & this what keeps us going & moving.

Mechanical power is the basis of civilized life. there are many sources of mechanical power for example: animals, wind, water, steam; coal; oil, uranium (mineral fuel), fuel gas; gasoline (petrol); heavy-oil engines, fuel cell, nuclear fusion, as opposed to fission. Hydrogen; magneto-hydrodynamics……etc

Entropy

Jim thinks that the concept of entropy is far too abstract & so he tries to explain entropy in terms of ”disorder”; & Jim thinks “entropy is a measure of disorder”. Yet, although there is a sense in what Jim says but his explanation fails to satisfy what entropy is because:

(i) Disorder is not, for most people, a concept which is expressible in numbers; how, for example, could a person measure whether his desk is more or less untidy than his workshop?

(ii) It does not appear in the least obvious that saturated steam at 100 °C is less disordered than saturated steam at 40 °C; yet the Steam Tables show that it has the lesser entropy.

The obstacles to understanding of entropy appear to reside in the facts that: entropy is related to measurements by a relationship involving ”integration”; & the defining relation carries a restriction (reversibility) which Jim seems to have no interest in. If
Jim knew enough about the movements of the molecules; he could calculate the entropy; it is not obvious that entropy is an important property, i.e. one connected to the interests of the engineer through force, “work-capacity”, or other lively idea.

The opening statements of by Jim Al-Khalili ”Order and Disorder & Energy”  in is fundamentally flawed; his argument on energy is not in line with real world, physics & thermodynamics.

Jim’s explanations both on energy & entropy fails from the start; & deviate from the laws of thermodynamics as the programme progresses, & it is doubtful what he says has any base in physics & thermodynamics

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