Question

Molar heat capacity of aluminium is `25 JK^(-1)mol^(-1)`. The heat necessary to raise the temperature of 54 g of aluminium (Atomic mass `27gmol^(-1)`) from `30^(@)C` to `50^(@)C` is
A. 1.5 kJ
B. 0.5 kJ
C. 1.0 kJ
D. 2.5 kJ

Answer 1

Correct Answer - C
`Q=nCDeltaT, n=(54)/(27)=2`
`=2xx25xx20=1000 J`
Q=1.0 kJ.