Q22
Reduction = species that GAINS electrons
Oxidation = process in which a specie will LOSS electrons
Reducing agent = The species that favors reduction, i.e. it will oxidize in order to reduce another species
Oxidizing agent = The species that favors oxidation, i.e. it will reduce in order to oxidise another species
then
Mg goes from +2 in MgSO4 to 0 in Mg, it gains 2e- then reduces. Therefore,MgSO4(aq) is the ox. agent
Ba goes from 0 to +2, then it is oxidized; therefore, Ba(s) is red. agent
Q23
entropy --> order of a system
a)
metling a solid will increase chaos, since liquid moves faster, then increases
b)
sublimation is solid to gas, therefore, icnreases chaos drastically, i.e. entropy is positive
c)
freezing is reverse as in a, therefore, negative change
d)
mixing -> two ordered states, A, B will form 1 chaotic mix, A+B, increases
e)
boils is simlar to sublimation, liquid goes to chaotic gas, increases
q24
Ssurr = QSurr/T
Qsurr= - Qsystme = -Hsystem
then
Ssurr = -Hsystem/T = -(-2221*1000)/(298)= 7453.02 J/K
22. For the following redox reaction Mgso4 (aq)+ Ba(s)-BaSOa(s)+ Mg (aq) Indicate the species being oxidized,...
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