## Essential University Physics: Volume 1 (3rd Edition)

$36.176\frac{J}{K}$
We know that $\Delta S=\int_{T_1}^{T_2}\frac{C_p dT}{T}$ $\Delta S=n\int_{T_1}^{T_2}(\frac{a+bT+cT^2}{T})dT$ $=n(a\ln(\frac{T_2}{T_1})+b(T_2-T_1)+\frac{c(T_2^2-T_1^2)}{2})$ $=2\times 18.088\frac{J}{K}$ $=36.176\frac{J}{K}$