Answer to Question #182092 in General Chemistry for Madison

Question

Hydrogen can be made in the “water gas reaction” 

C (s) + H2O (g) → H2 (g) + CO (g) 

If you begin with 250. L of gaseous water at 120oC and 2.0 atm, how many grams of H2 can be made?

Answer 1

using PV = nRT

n = PV/RT

n = 2 x 250/(0.082 x 393)

= 15.52 moles of water

1 mole of water = 1 mole of h2

18g water = 2g H2

15.52g water = 2 x 15.52 / 18

= 1.72g H2