A 1kg gas within a piston-cylinder assembly undergoes an isothermal reversible process at 400 K during which the change in entropy is -0.3 kJ/K. Assuming the ideal gas model with constant specific heats for the gas and negligible kinetic and potential energy effects, evaluate the work, in kJ. Assume that the boundary is also at 400 K and C = 3.116 kJ/kg-K

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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.