# Recent questions in Chemistry

Calculate the amount of heat released in the complete combustion of 8.17 g of Al to form Al2O3(s) at 25°C and 1 atm.

$\Delta H_f^o for Al_2O_3(s) =-1680 kJ/mol.$

$4Al(s)  +3O_2(g) \rightarrow 2Al_2O_3(s)$

$3Fe(s)  +4H_2O(l) \rightarrow Fe_3O_4(s)  +4H_2(g)$