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The SI unit of entropy is...

The SI unit of entropy is

A

joule/kelvin

B

newton-meter

C

calorie/second

D

joule/calorie

Text Solution

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The correct Answer is:
A
The S.I. unit of entropy is joule/kelvin.
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The unit of entropy is

Entropy ( S ) is a thermodynamic variable like pressure P , volume V and temperature T . Entropy of a thermodynamic system is a measure of disorder of molecular motion. Greater is disorder , greater is entropy. Change in entropy of a thermodynamic system is the ratio of heat supplied to absolute temperature.In an adiabatic reversible process, entropy remains constant while in any irreversible process entropy increases. In nature the processes are irreversible , therefore entropy of universe is continuoulsy increasing. The unit of entropy in S-I system is -

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ALLEN -PHYSICAL WORLD, UNITS AND DIMENSIONS & ERRORS IN MEASUREMENT -EXERCISE-III
  1. In a particular system the units of length, mass and time are chose to...

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  2. The Bernoull's equation is given by P+(1)/(2)pv^(2)+hpg=k Where P=...

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  3. The period of oscillation of a simple pendulum in the experiment is re...

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  4. The length, breadth and thickness of a strip are (10.0+-0.1)cm,(1.00+-...

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  5. The length of a cylinder is measured with a metre rod having least cou...

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  6. Which of the following are not the units of self inductance ?

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  7. If energy (E), velcocity (V) and time (T) were chosen as fundamental p...

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  8. Which of the following represents the dimensions of farad?

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  9. Dimensional formula of magnetic flux is .......

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  10. Which of the following does not have the same unit as others

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  11. Suppose refractive indes mu is given as mu=A+B//lambda^(2), were A and...

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  12. The SI unit of entropy is

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  13. The dimensional formula for Planck's constant h and gravitational cons...

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  14. If E, M, L and G denote energyy, mass, angular momentum and gravitaion...

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  15. The dimension of the quantity vecExxvecB, where vecE represents the el...

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  16. If a set of defective weights are used by a students to find the mass ...

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  17. A physical quantity epsilon is calculated using the formula epsilon=(x...

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  18. A wire has a mass (0.3+-0.003)g, radius (0.5+-0.005)mm and length (6+-...

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  19. In a vernier callipers, one main scale division is x cm and n division...

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  20. Choose the incorrect statement out of the following :-

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