13. Describe such functions of the state of the system as internal energy, entropy, enthalpy, isobaric-isothermal potential. What is the relationship between these quantities? Formulate the second law of thermodynamics. Give the criteria by which the spontaneity of the process is determined. Calculate the change in entropy during the processes indicated in the table for your version of the problem, using the absolute entropy values ​​of substances (see Appendix)

Problem No. Processes

13 2NO O2 = 2NO2

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