28. Inside a long cylinder, n 0.5 mole of an ideal mono-atomic gas is trapped with the help of an airtight heat-insulating piston. The curved wall of the cylinder is made of a heat conducting material and the circular base is made of a heat insulating material. The piston is connected with left wall of the cylinder with an elastic rubber cord of negligible relaxed length and force constant k = 25 N/m. The cylinder is placed in an airtight evacuated oven and then oven is switched on. The piston is stopped at a distance lo cylinder, rate of temperature increase of the gas is measured and then 1.0 m from the left end of the nto of temperature increase is ro = 0.

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Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.