Subject: Statistical and Thermal PhysicsOnly number 4. Please supply all the equation and solutions needed to solve for this set of problem. Thank you. 3. The temperature of 1 kg of water at 0°C is increased to 50°C by first bringing it into contact with aheat bath at 25°C and then with a heat bath at 50°C. What is the change in entropy of the entiresystem?4. Calculateav Efor the van der Waals energy equation of state3E = NkT-NNETkT - Na(van der Waals energy equation of state)and show that a free expansion results in cooling.

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Answered: 3. The temperature of 1 kg of water at…

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