(e) The system starts at temperature To, magnetic field Ho, and pressure po. The magnetic field is changed quasistatically, adiabatically, and isothermally to a new value H. (This requires adjusting the pressure and hence the volume - to keep T constant without adding heat.) Find the new pressure p in terms of H, Ho, To, Po, and constants. (f) The system starts at temperature To and magnetic field Ho. The magnetic field is changed adiabatically, quasistatically, and at constant pressure, to a new value H. Inte- grate the appropriate differential equation to find an equation relating the new temper- ature T to H, Ho, To, and constants. (This equation can be solved for T as a function of H, Ho, To, but you do not need to do it.) [Hint: Define a new variable f = aH²/(2T²), find df, and use it to simplify your differential equation.]
(e) The system starts at temperature To, magnetic field Ho, and pressure po. The magnetic field is changed quasistatically, adiabatically, and isothermally to a new value H. (This requires adjusting the pressure and hence the volume - to keep T constant without adding heat.) Find the new pressure p in terms of H, Ho, To, Po, and constants. (f) The system starts at temperature To and magnetic field Ho. The magnetic field is changed adiabatically, quasistatically, and at constant pressure, to a new value H. Inte- grate the appropriate differential equation to find an equation relating the new temper- ature T to H, Ho, To, and constants. (This equation can be solved for T as a function of H, Ho, To, but you do not need to do it.) [Hint: Define a new variable f = aH²/(2T²), find df, and use it to simplify your differential equation.]
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