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Topic: Energy in reactions.  (Read 4275 times)

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Offline Shea

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Energy in reactions.
« on: August 19, 2006, 01:55:55 AM »
How much energy is released when 1 L of O2 reacts with excess sulphur at STP?

Now, I know that 1 L of O2 is 1.429 g, and 1.429 g of O2 = 0.04466 moles.  What else do I do?

How do I find the energy???  Is this another PV=nRT question?

I'd try writing the equation, but I don't know the products.  How do you guys always know the products?
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Offline Mitch

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Re: Energy in reactions.
« Reply #1 on: August 19, 2006, 02:17:14 AM »
Sulfur dioxide
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Offline Shea

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Re: Energy in reactions.
« Reply #2 on: August 19, 2006, 05:04:50 AM »
O2 + S -> SO2???

How do I find the energy?
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Offline sdekivit

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Re: Energy in reactions.
« Reply #3 on: August 19, 2006, 05:33:50 AM »
do you know the enthalpy of formation of SO2 in J/mol or equivalent units ? Or the binding energy ?

Than you know how many mol SO2 is formed and thus the energy released/absorbed by the reaction.
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