Entropy Change To find the Entropy change, start with the expression derived from the first law, replacing du using the definition of specific heat at constant volume and using the definition of entropy △ Ax三C. In 3) Work done and Heat transferred(功量和热量) Applying the first law of thermodynamics to the process dU=-6 Replacing ow with the reversible work du=5o-pdy since the volume is constant dv= o W=0∞=l=lnEntropy Change To find the Entropy change, start with the expression derived from the first law, replacing dU using the definition of specific heat at constant volume and using the definition of entropy (3) Work done and Heat Transferred(功量和热量) Applying the first law of thermodynamics to the process Replacing δW with the reversible work since the volume is constant dV = 0 q = du Tds = cv dT 1 2 ln T T s c  = v dU = Q −W dU = Q − PdV W = 0 Q = dU