**Equilibrium Reaction: C _{3}H_{8(g)} + 6H_{2}O_{(g)} → 3CO_{2(g)} + 10H_{2(g)} **

$\mathbf{mole}\mathbf{}\mathbf{fraction}\left(\chi \right)\mathbf{}{\mathbf{C}}_{\mathbf{3}}{\mathbf{H}}_{\mathbf{8}\mathbf{\left(}\mathbf{g}\mathbf{\right)}}\mathbf{}\mathbf{=}\frac{\mathbf{moles}\mathbf{}{\mathbf{C}}_{\mathbf{3}}{\mathbf{H}}_{\mathbf{8}\mathbf{\left(}\mathbf{g}\mathbf{\right)}}}{\mathbf{total}\mathbf{}\mathbf{moles}}\mathbf{=}\frac{\mathbf{1}\mathbf{.}\mathbf{00}\mathbf{}\mathbf{mol}}{\mathbf{1}\mathbf{.}\mathbf{00}\mathbf{}\mathbf{mol}\mathbf{}\mathbf{+}\mathbf{}\mathbf{4}\mathbf{.}\mathbf{00}\mathbf{}\mathbf{mol}}\mathbf{=}$**0.2**

$\mathbf{mole}\mathbf{}\mathbf{fraction}\left(\chi \right)\mathbf{}{\mathbf{H}}_{\mathbf{2}}{\mathbf{O}}_{\mathbf{\left(}\mathbf{g}\mathbf{\right)}}\mathbf{=}\frac{\mathbf{moles}\mathbf{}{\mathbf{H}}_{\mathbf{2}}{\mathbf{O}}_{\mathbf{\left(}\mathbf{g}\mathbf{\right)}}}{\mathbf{total}\mathbf{}\mathbf{moles}}\mathbf{=}\frac{\mathbf{4}\mathbf{.}\mathbf{00}\mathbf{}\mathbf{mol}}{\mathbf{1}\mathbf{.}\mathbf{00}\mathbf{}\mathbf{mol}\mathbf{}\mathbf{+}\mathbf{}\mathbf{4}\mathbf{.}\mathbf{00}\mathbf{}\mathbf{mol}}\mathbf{=}$**0.8**

The methane used to obtain H_{2} for NH_{3} manufacture is impure and usually contains other hydrocarbons, such as propane, C_{3}H_{8}. Imagine the reaction of propane occurring in two steps:

C_{3}H_{8}(g) + 3H_{2}O(g) ⥫⥬ 3CO(g) + 7H _{2}(g)

K _{p} = 8.175×10^{15} at 1200. K

CO(g) + H_{2}O(g) ⥫⥬ CO_{2}(g) + H_{2}(g)

K _{p} = 0.6944 at 1200. K

(c) When 1.00 volume of C_{3}H_{8} and 4.00 volumes of H_{2}O, each at 1200. K and 5.0 atm, are mixed in a container, what is the final pressure? Assume the total volume remains constant, that the reaction is essentially complete, and that the gases behave ideally.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Equilibrium Expressions concept. If you need more Equilibrium Expressions practice, you can also practice Equilibrium Expressions practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Cao's class at UF.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.