Question

Write the device modeling equation for the first and second law of thermodynamics

Answer 1

1st the total energy of an isolated system is constant; energy can be transformed from one form to another, but can be neither created nor destroyed. ▲U=Q-W
 
2nd the total entropy can never decrease over time for an isolated system, that is, a system in which neither energy nor matter can enter nor leave.
DS (Greater than or equal to) 0