What is entropy of a pen?
wht is the entropy of a pen?
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Member • Mar 20, 2009
this Ques was asked in CAT interview.
plz help me and tell me the ans.Are you sure? This action cannot be undone. -
Member • Mar 20, 2009
No need to "bump" the post within a day, I'm sure some CEans will offer some advice. =) Have you searched on the net?Are you sure? This action cannot be undone. -
Member • Mar 20, 2009
This is a trick question to check your wit. Similar to asking, What is the color of wall behind you? etc. If you stutter and think, then it shows you lack confidence. Entropy also depends on the structure and different materials have different structure. You are not supposed to know the exact value.
From Wiki:
Entropy is defined by an equation dS = dq/T.
It determines a body's free energy.
Entropy increase has often been defined as a change to a more <a href="https://en.wikipedia.org/wiki/Disordered_state" target="_blank" rel="nofollow noopener noreferrer">Disordered State</a> at a molecular level. In recent years, entropy has been interpreted in terms of the "<a href="https://en.wikipedia.org/wiki/Entropy_%28energy_dispersal%29" target="_blank" rel="nofollow noopener noreferrer">Entropy %28Energy Dispersal%29</a>" of energy. Entropy is an <a href="https://en.wikipedia.org/wiki/Extensive_quantity" target="_blank" rel="nofollow noopener noreferrer">Extensive Quantity</a> <a href="https://en.wikipedia.org/wiki/State_function" target="_blank" rel="nofollow noopener noreferrer">State Function</a> that accounts for the effects of <a href="https://en.wikipedia.org/wiki/Irreversibility" target="_blank" rel="nofollow noopener noreferrer">Irreversibility</a> in <a href="https://en.wikipedia.org/wiki/Thermodynamic_system" target="_blank" rel="nofollow noopener noreferrer">Thermodynamic System</a>.
In terms of <a href="https://en.wikipedia.org/wiki/Statistical_mechanics" target="_blank" rel="nofollow noopener noreferrer">Statistical Mechanics</a>, the entropy describes the number of the possible <a href="https://en.wikipedia.org/wiki/Microstate_%28statistical_mechanics%29" target="_blank" rel="nofollow noopener noreferrer">Microstate %28Statistical Mechanics%29</a> of the system. The statistical definition of entropy is the more fundamental definition, from which all other definitions and all properties of entropy follow.
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