Question

A piece of aluminum with mass of 5.0 g is immersed in 30.0 g of water. This system is heated electrically from 20.8 to 42.6°C. How many joules of energy are absorbed by the aluminum? (Cpaluminum = 24.4 J/mol-K; 1 mole of aluminum has a mass of 27.0 g)

Answer 1

And How many joules of energy are absorbed by the water?

Answer 2

q Al = mass Al x specific heat Al x (Tfinal-Tinitial)

q H2O = mass H2O x specific heat H2O x (Tfinal-Tinitial)
Note: If you use specific heats in J/mol*K then you must use mass in mols and not grams.