Question

The heat capacity, CP, of liquid carbon disulfide is a relatively constant 78 J/(mol·K). However, the heat capacity of solid carbon disulfide varies greatly with temperature. From 99 K to its melting point at 161 K, the heat capacity of solid carbon disulfide increases linearly from 44 J/(mol·K) to 57 J/(mol·K). The enthalpy of fusion of carbon disulfude is ΔHfus = 4390 J/mol. The absolute entropy of liquid carbon disulfide at 298 K is S = 151 J/(mol·K). Estimate the absolute entropy of carbon disulfide at 99 K.