Question

 Calculate the number of kj of heat necessary to raise the temperature of 60 g of aluminium from 35°C to 55°C. Molar heat capacity of Al is 24 J mol-1 K-1.​

Answer 1

Answer:

From the expression of heat (q), <br>

<br> Wher, <br> c= molar heat capacity <br> m= mass of substance <br>

= change in temperature <br> Substituting the values in the expression of q: <br>

<br> q=1066.7J <br> q=1.07 kJ

Answer 2

Answer:

no. of moles of al=2.22mol

molar heat=24 J mole k

rise in temp delta t= 55-35

heat evolved = C * m * T

= 24 * 2.22* 20k

=1065J

= 1.06Kj