How much heat is evolved when 256 g of 2SO2 (molar mass = 64 g/mol) is burned according to the chemical equation shown below?

2 SO2 (g)  +  O2 (g)   ➜    2 SO3 (g)                                    ∆H = - 200 KJ/mol

 

   

50-
   

200-
   

400-
   

800-