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November 01, 2025, 12:39:04 pm
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Author Topic: Are they just plain wrong?  (Read 1295 times)  Share 

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Martoman

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Are they just plain wrong?
« on: November 06, 2010, 06:31:41 pm »
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An equlibrium reaction takes place at 800 degrees.



 In each experiment, 50g of methane was reacted with excess steam. The mass of H2 evolved was measured.

Now my calculations ie: 50/16 * 3 * 2 = mass of h2 evolved. = 18.75. THEIR graph however of the first experiment at 800 degrees shows the graph tapering off at 5g of H2 evolved. Why is this the case?
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fady_22

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Re: Are they just plain wrong?
« Reply #1 on: November 06, 2010, 06:36:14 pm »
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It's an equilibrium reaction.
It doesn't go to completion. :)
« Last Edit: November 06, 2010, 06:37:57 pm by fady_22 »
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Martoman

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Re: Are they just plain wrong?
« Reply #2 on: November 06, 2010, 06:39:26 pm »
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gahhhhh  :-[

Also, does that mean increasing temp in the same time will produce more?
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fady_22

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Re: Are they just plain wrong?
« Reply #3 on: November 06, 2010, 06:41:09 pm »
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It's an exothermic reaction (combustion) so increasing temp decreases the amount of H2 evolved.
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Martoman

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Re: Are they just plain wrong?
« Reply #4 on: November 06, 2010, 06:41:59 pm »
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it isn't combustion, its endothermic actually.
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fady_22

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Re: Are they just plain wrong?
« Reply #5 on: November 06, 2010, 06:44:18 pm »
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Whoops. Didn't look at the equation. I just assumed that methane= combustion. :P
In that case, you are right.
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Martoman

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Re: Are they just plain wrong?
« Reply #6 on: November 06, 2010, 06:49:54 pm »
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Thanks hun  :smitten:
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fady_22

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Re: Are they just plain wrong?
« Reply #7 on: November 06, 2010, 06:58:44 pm »
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No worries babe.  8-)
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Shark 774

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Re: Are they just plain wrong?
« Reply #8 on: November 06, 2010, 11:38:23 pm »
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Get a room :P
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