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Topic: spontaneous reactions  (Read 3999 times)

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Offline poblisimo

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spontaneous reactions
« on: June 17, 2013, 01:19:52 PM »
Can someone please explain to me how to answer this question. i cant find anything to show me online.

Which reaction occurs spontaneously?
(1) Cl2(g) + 2NaBr(aq) → Br2(l) + 2NaCl(aq)
(2) Cl2(g) + 2NaF(aq) → F2(g) + 2NaCl(aq)
(3) I2(s) + 2NaBr(aq) → Br2(l) + 2NaI(aq)
(4) I2(s) + 2NaF(aq) → F2(g) + 2NaI(aq)

I know its 1 but i dont know why
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Offline Borek

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Re: spontaneous reactions
« Reply #1 on: June 17, 2013, 01:34:51 PM »
It is about reactivity of halogens.
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Offline Bublik

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Re: spontaneous reactions
« Reply #2 on: June 18, 2013, 12:38:55 PM »
Think of the halogen trends. Would you expect reactivity to increase or decrease as you go down a group?
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