Question

Calculate the number of KJ necessary to raise the temperature of 60g of aluminium from 35 to 55 degree Celsius. Molar heat capacity of aluminium is 24 J /mol/Kelvin.

Answer 1

I think answer is 28.8kj
q=ms∆t
60×24×55-35
=28800

Answer 2

Answer:

• No.of moles of Al = 60g/27

= 2.22 mol

• Molar heat capacity = 24J/molK

• Rise in temperature ΔT = 55-35

=20K

• Heat evolved (q) = C x m x T

=24 x 2.22 x 20

=1065.7 J

=1.06kJ