An unknown ideal gas with a molecular mass of 32 kg/kgmol undergoes an isochoric process. The initial and final temperature of the tank is 220°C and 800°C, respectively. If the change in internal energy of the  system is 170 KJ per kg of gas, determine the change in enthalpy, in KJ/kg and change in entropy, in KJ/kg-K. (Ans. 320.7 kJ/kg , 0.2779 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.