questions 1 and 2 plz

1. The enthalpies of the following reactions are given: (K/U) 2NaCl(s)+H2SO4(l)Na2SO4(s)+2HCl(g)Na(s)+1/2Cl2(g)NaCl(s)H=410.5kJH2(g)+S(s)+2O2(g)H2SO4(l)H=810.2kJ2Na(s)+S(s)+2O2(g)Na2SO4(s)H=1381.5kJ1/2H2(g)+1/2Cl2(g)HCl(g)H=184.4kJ a) From these data, calculate H for the reaction: b) What is Hess's Law? Explain- 2. The following reaction was studied using the method of initial rates. (T/I) 3A(aq)+4B(aq) products The following data were collected. a) Write the rate law equation. b) What is the overall reaction order? c) Calculate the value of the rate constant, with the proper units