Quiz Q1 Answer S.J.T.U. Phase Transformation and Applications 1-3-i Derive an expression for the final temperature after a process leading to the figure on the right of the illustration. Change in internal energy of system =Heat flow into Pb and water Imghl =Cpb(Tyinal-20)+CHO(Tyinat-20) mgh] Trmal=20+Cpb+CHaO 1-3-ii Would the temperature be larger or smaller if the block of lead had fallen to the left (i.e., into the water)? Tricky.The answer is that the temperature will be lower. The center of mass of the water will raise and so part of the potential energy of the lead weight will be converted to potential energy of the water.mg would be decreased by an amount corresponding to the raise of center of mass of the water. SJTU Thermodynamics of Materials Spring 2007 ©X.J.Jin Lecture 8 Chemical equilibriumPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2007 © X. J. Jin Lecture 8 Chemical equilibrium Quiz Q1 Answer