4. A 32.5 g piece of aluminum (which has a molar heat capacity of 24.03 J/°C·mol) is heated to 82.4°C and
dropped into a calorimeter containing water (specific heat capacity of water is 4.18 J/g°C) initially at
22.3°C. The final temperature of the water is 24.2°C. Ignoring significant figures, calculate the mass of
water in the calorimeter. (Al: 26.98 g/mol)
(A) 212 g；
(B) 5.72 kg；
(C) 6.42 g；
(D) 1.68 kg；
(E) none of these
阿摩線上測驗
登入