Question

Fan + Medal

Answer 1

Delta H = [(2)(-411) + (-277)] - [(2)(-360) + (-359)]
Delta H = [(-822) + (-277)] - [(-720) + (-359)]
Delta H = [(-1099) - (-1079)]
Delta H = - 20 kJ

Answer 2

I guess I'll help n this one :)
=(2)(-411)+(-277)-(2)-(360)+(-359)
=(-822)+(-277)-(-720)+(-359)
=(-1099)-(-1079)
=-20kj
hope this helps