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enthalpy stuff
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can someone explain to me why they subtracted 21 instead of adding it? i don't get what's going on
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Attachment 661796661798
Attachment 661796661798661800
question 3 from this paper - http://pmt.physicsandmathstutor.com/...Energetics.pdf
mark scheme - http://pmt.physicsandmathstutor.com/...etics%20MS.pdf
Attachment 661796661798
Attachment 661796661798661800
question 3 from this paper - http://pmt.physicsandmathstutor.com/...Energetics.pdf
mark scheme - http://pmt.physicsandmathstutor.com/...etics%20MS.pdf
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#4
(Original post by spofy)
helpp
helpp
Enthalpy of solution of LiOH is -21 KJmol^-1
They have missed the minus sign in the question!
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