Help please!
1. What is the change in enthalpy when 180 g of water vapor condenses at 100oC? (Hv = 40.67 kJ/mol) (Points : 3)
-565
-407
407
565

answer I think 407?

2.You have the following equations:
2S (s) + 3O2 (g) 2SO3 (g), H = 792 kJ
2S (s) + 2O2 (g) 2SO2 (g), H = 594 kJ
2SO2 (g) + O2 (g) 2SO3 (g), H = ?
What is the missing H?
(Points : 3)
-594 kJ

- 198 kJ

+198 kJ

+792 kJ
answer is B -198?

Question

Help please!
1. What is the change in enthalpy when 180 g of water vapor condenses at 100oC? (Hv = 40.67 kJ/mol) (Points : 3)
-565
-407
407
565

answer I think 407?

2.You have the following equations:
2S (s) + 3O2 (g)  2SO3 (g), H = 792 kJ
2S (s) + 2O2 (g)  2SO2 (g), H = 594 kJ
2SO2 (g) + O2 (g)  2SO3 (g), H = ?
What is the missing H?
(Points : 3)
       -594 kJ

      - 198 kJ

       +198 kJ

       +792 kJ
answer is B -198?

abb0t · Answer

Did you actually get the calculation and get 407 or are you just guessing?