Bond Enthalpies
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Bond Enthalpies
Can someone please explain to me why bond enthalpies (method 2) are always positive? Thank you!
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Re: Bond Enthalpies
Energy is required to break a bond! Like in an endothermic reaction, energy is inputed and so the energy required to break the bonds is positive
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Re: Bond Enthalpies
Also, the products side is negative because energy is released when new bonds are formed.
Re: Bond Enthalpies
Katelyn 2E wrote:Can someone please explain to me why bond enthalpies (method 2) are always positive? Thank you!
Yea np I gotchu girl! In method 2, the bond enthalpy values given are always positive, because the value given represents the amount of kJ/mol required to break the bond. Since breaking the bond requires energy, the process is endothermic and therefore the enthalpy value is positive.
Re: Bond Enthalpies
Because you are breaking the bonds, meaning energy is required and that mean positive value
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Re: Bond Enthalpies
And vice versa, if you were to add bonds, the reaction would be exothermic because energy is released when bonds are formed. Thus it would be negative if you were talking about the opposite.
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