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What is the unit of entropy?

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प्रश्न

What is the unit of entropy?

एक पंक्ति में उत्तर
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उत्तर

SI unit of entropy is J K−1

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Various Statements of the Second Law of Thermodynamics
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 7: Thermodynamics - Evaluation [पृष्ठ २२४]

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सामाचीर कलवी Chemistry - Volume 1 and 2 [English] Class 11 TN Board
अध्याय 7 Thermodynamics
Evaluation | Q II. 5. b. | पृष्ठ २२४

संबंधित प्रश्न

∆S is expected to be maximum for the reaction


The values of ∆H and ∆S for a reaction are respectively 30 kJ mol–1 and 100 JK–1 mol–1. Then the temperature above which the reaction will become spontaneous is


What is the usual definition of entropy?


Identify the state and path functions out of the following:

  1. Enthalpy
  2. Entropy
  3. Heat
  4. Temperature
  5. Work
  6. Free energy

Calculate the entropy change in the system, and surroundings, and the total entropy change in the universe during a process in which 245 J of heat flows out of the system at 77°C to the surrounding at 33°C.


1 mole of an ideal gas, maintained at 4.1 atm and at a certain temperature, absorbs heat 3710 J and expands to 2 litres. Calculate the entropy change in the expansion process.


30.4 kJ is required to melt one mole of sodium chloride. The entropy change during melting is 28.4 JK−1 mol−1. Calculate the melting point of sodium chloride.


You are given normal boiling points and standard enthalpies of vapourisation. Calculate the entropy of vapourisation of liquids listed below.

Liquid Boiling points (°C) ΔH (kJ mol−1)
Ethanol 78.4 + 42.4

You are given normal boiling points and standard enthalpies of vapourisation. Calculate the entropy of vapourisation of liquids listed below.

Liquid Boiling points (°C) ΔH (kJ mol−1)
Toluene 110.6 + 35.2

Calculate the enthalpy of hydrogenation of ethylene from the following data.

Bond energies of C − H, C − C, C = C and H − H are 414, 347, 618 and 435 kJ mol−1.


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