0.03 m3 of nitrogen contained in a cylinder behind apiston is initially at 1.05 bar and 15ºC. The gas iscompressed isothermally and reversibly until the pressureis 4.2 bar. Calculate the change of entropy, the heat flow,and the work done, and sketch the process on a p-v andT-s diagrams. Assume nitrogen to act as a perfect gas.Molecular weight of nitrogen = 28.

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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.