4.31 Water gas in inexpensive [ENDORSED]

[Alex_Lee_1K]

Water gas is an inexpensive, low-grade fuel that can be made from coal. (a) Is the production of water gas exothermic or endothermic? The reaction is

C(s)+H2O(g)→CO(g)+H2(g)

(b) Calculate the enthalpy change for the production of 200. L of hydrogen at 500. Torr and 65°C by this reaction.

Hello, I am having trouble getting started with this question and how to find the standard change in enthalpy.

[Chem_Mod]

Use the method I discussed in class: Look up the standard enthalpies of formation of the reactants and products and take the difference (products - reactants).

See the detailed example I did in class.

Use the ideal gas law to calculate the moles of H₂(g):

PV = nRT

n = PV/RT

Then multiply the enthalpy per mole by the moles of H₂(g).

You can see the detailed solution in the Student Solutions Manual.

Reminder that the detailed step-by-step solutions to the problems in the syllabus are on Achieve under the folder: Student Solutions Manual