[填空题]
When a 290-g piece ofx v42 xw;1v outn(kk4)jfs-pb ironi9he ygb c9yl+,,q qi* at 180$^{\circ} C$ is placed in a 95-g aluminum calorimeter cup containing 250 g of glycerin at 10$^{\circ} C$ , the final temperature is observed to be 38$^{\circ}C $ . Estimate the specific heat of glycerin. $J/kg \cdot C^{\circ} $