A piston-cylinder contains gas initially at 3500 kPaa with a volume of 0.03 m³. The gas is compressed during a process where pV1.25 = C to a pressure of 8500 kPaa. The heat transfer from the gas is 2.5 kJ. Determine the (a) Work and (b) change in internal energy, neglecting changes in kinetic and potential energies. 5.

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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.