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posted by  borden on 6/20/2008 6:41:46 PM  |  status: Live  

equilibrium

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how do you know when a reaction is at equilibrium? I mean, how do you know without the stoitometric equation, by just looking at an compound?

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posted by ela on 6/20/2008 7:20:47 PM  |  status: Live
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borden's comment:
"But is there a way to know without looking at the equation"
Response Details:
Equillibrium is the state in which the concentrations of the reactants and products have no net change over time. The reaction can go from products to reactants silmultaneously. 
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posted by Xylene on 6/20/2008 9:12:58 PM  |  status: Live
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Response Details:
 The physical appearance of the compound does not change.. for example if the reaction is
       2NO + O2 ------->2NO2   The colour of nitrogen dioxide does not change, initially the colour is light brown, later on reaching equilibrium the colour remains constant, which indicates that the reaction has reached equilibrium
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