using System; using L=Science.Physics.GeneralPhysics; namespace Serway.Chapter22 { /// /// Example09: Calculating \Delta S for a Calorimetric Process /// Suppose that 1.0 kg of water at 0 C is mixed with an equal /// mass of water at 100 C. After equilibrium is reached, the /// mixture has a uniform temperature of 50 C. What is the /// change in entropy of the system? /// \Delta S = 102 J/K /// public class Example09 { public Example09() { } private string result; public string Result { get{return result;} } public void Compute() { L.Temperature T1 = new L.Temperature(); T1.K = 0.0+273.0; L.Temperature T2 = new L.Temperature(); T2.K = 100.0+273.0; L.Temperature Tf = new L.Temperature(); Tf.K = 50.0+273.0; L.Mass m = new L.Mass(); m.kg = 1.0; L.SpecificHeat c = new L.SpecificHeat(); c.JPERkgPERCelsius = 4186.0; L.Entropy S = new L.Entropy(); S.JPERK = m.kg*c.JPERkgPERCelsius *Math.Log(Tf.K/T1.K*Tf.K/T2.K); result+=S.ToString(); } } } //101.529050746827 +/- 0 (J/K)