The heat capacity of aluminum is 24.4 J/mol times degrees C. How much energy is released when 5.00 g Al is cooled from 50 degrees C to 30 degrees C.

Question

a) 2440 J b) 90 J
c) 3.7 J d) 488 J

I said A, but the answer sheet says that the answer is B. Can someone please explain how this is so? I multiplied 5 times 24.4 times -20 (30-50) Thanks!

Answer 1

Never mind, I figured out I needed to convert the moles to grams and then I would use the q = mc delta t.

Answer 2

right