00:01
They've given us the balanced chemical reaction with the kp value.
00:04
Kp won't include the carbon because it's a solid, so it'll just be the pressure of our product, ammonia, i'm sorry, methane, divided by the pressure of hydrogen raised to its coefficient of 2.
00:18
We can calculate the initial pressure of hydrogen using the ideal gas law, and that gives us an initial pressure of 21 .6, 4, if we don't have anything of methane, then a reaction will occur where this pressure will decrease by 2x, and the methane will increase by x.
00:45
So at equilibrium, we have 21 .64 minus 2x, and x, we can now use this equation to solve for x.
00:58
We've got x divided by 21 .64 minus 2x squared equal to 0 .263...