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Photon336
 one year ago
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 one year ago
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Photon336
 one year ago
Best ResponseYou've already chosen the best response.0Question is attached

Photon336
 one year ago
Best ResponseYou've already chosen the best response.0@sweetburger @Rushwr

Photon336
 one year ago
Best ResponseYou've already chosen the best response.0\[2CH _{4} + 3O _{2} > 2CO + 4H _{2}O\]

Photon336
 one year ago
Best ResponseYou've already chosen the best response.0Like i though that for this reaction we have entropy goes up because we have on the reactant side 2+3 moles = 5 moles and on the product side we have 2+4 = 6 moles. So we have more moles on the product side so i thought more moles = more disorder.

Photon336
 one year ago
Best ResponseYou've already chosen the best response.0\[\Delta G = \Delta H  T \Delta S\]

Photon336
 one year ago
Best ResponseYou've already chosen the best response.0wait... entropy >0 and if it's spontaneous G<0 so h <0

Rushwr
 one year ago
Best ResponseYou've already chosen the best response.0okai since the product side had more moles than the reactants we took \[\Delta S\] as pistive right? Okai so anyhow the T\[\Delta S\] we consider the whole part as negative. But to find the enthalpy change if its +ve or ve we need to know if the reaction is spontaneous or not right? But they haven't given that here.

Photon336
 one year ago
Best ResponseYou've already chosen the best response.0@Rushwr I agree, I had trouble with that, actually I just assumed that the reaction was spontaneous. b/c then I knew okay delta S was positive so then I thought that delta H had to be negative the book doesnt really give an explanation as to how you can figure out that it's exothermic, like it just says oh " this type of reaction is exothermic"

Rushwr
 one year ago
Best ResponseYou've already chosen the best response.0yeah so this reaction is exothermic

Rushwr
 one year ago
Best ResponseYou've already chosen the best response.0bond formation is always exothermic while bond dissociation is always endothermic. hence this reaction is exothermic. In exothermic reactions delta H is positive. Cuz it produces heat while in endothermic reactions delta H is negative cuz they absorb heat ! So that is why I choose that one
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