Answer:21.6 Joules
Explanation:
[tex]Q= m\times c\times \Delta T[/tex]
Q= heat gained
m= mass of the substance = 8g
c = heat capacity of iron= 0.45 J/g ° C
[tex]\Delta T={\text{Change in temperature}}=6^oC[/tex]
[tex]Q=8g\times 0.45J/g^oC\times6^oC[/tex]
Q= 21.6 Joules
Thus heat gained by 8 g of iron is = 21.6 Joules
