(a)Use Eq. 18.28 to calculate the specific heat at constant volume of aluminum in units of j/kg · K. Consult the periodic table in Appendix D. (b) Compare the answer in part (a) with the value given in Table 17.3. Try to explain any disagreement between these two values.

Solution 45E Step 1 The molar specific heat at constant volume is given by C V = 3R Here R is the ideal gas constant and is given by R = 8.31 J/mol.K Hence the molar specific heat of ideal solid is C V = 3(8.31 J/mol.K) = 24.93 J/mol/K Now the atomic mass of aluminium is 26.98. Hence the molar mass of aluminium is 3 M = 26.98 g/mol = 26.98 × 10 kg/mol Hence the specific heat of aluminium at constant volume is given by C cv= V = 24.933/mol.= 924 J/kg.K M 26.98×1kg/mol