Thermochemistry Question...?

Question

A 25g piece of aluminum (which has a molar heat capacity of 24.03J/C mol) is heated to 82.4 degrees C and dropped into a calorimeter containing water (specific heat capacity of water is 4.18) initially at 22.3 degrees C. The final temperature of the water is 24.9 degrees C. Calculate the mass of water in the calorimeter.

Please help me somebody....

Answer 1

first you'll start with Q=m*c*delta t to get the total energy of the aluminum. divide the grams of aluminum by its molar weight and then use Q=m*c*delta t where the Q's are the same, c for the water is 4.18 J/gC and then solve for the mass. good luck!