[填空题]
An aluminum rod condu 7suwv(,ljb:m ctc/tp:ph 5y:j;v zyxr1 s $7.50\,cal/s$ from a heat source maintained at 240$^{\circ}\,C$ to a large body of water at 27$^{\circ}\,C$. Calculate the rate entropy increases per unit time in this process. $\frac{J/K}{s}$
