I would like these to be answered thoughtfully and with explenations for the ans
ID: 780566 • Letter: I
Question
I would like these to be answered thoughtfully and with explenations for the answers. If I wanted the final answer I would look in te back of the book.
4. Use Hess's Law to find the heat of reaction in the example below.
N2O4 (g) ----> 2NO2 (g)
Given that:
N2O4 (g) ----> N2 (g) + 2O2 (g) (Delta H = -9.7kJ)
2NO2 (g) ----> 2O2(g) + N2(g) ( Delta H = -67.7kJ)
8.Calculate the (Delta H) for this reaction:
Zn(s) + Cu (2+ ion)(aq) ---> Zn(2+) + Cu(s)
(Delta H) for Cu(2+) = +64.4 kJ/Mol; (Delta H) for Zn(2+) = -152.4 kJ/mol
PLEASE PROVIDE A CLEAR EXPLANATION FOR #17
17. If one mole of each of these solutes in added to the same amount of water, which solution has the highest boiling point? (glucose, aluminum sulfate, magnesium acetate, copper (I) chloride)
PLEASE PROVIDE CLEAR EXPLANATION
23. With solutions of "strong" acids and "strong" bases, the word "strong" refers to ...
24. What are the products of Al(OH)3 + H2CO3?
FOR #33 and #36 HOW DO WE KNOW THE OX # IF THERE ARE NO OXYGEN OR HYDROGEN?
33. Identify the oxidizing agent in the following reaction: 2Na + S ---> Na2S
36. Which atom has a change in oxidation number of +4 in the following reaction?
K2Cr2O7 + H2O + S ----> KOH + Cr2O3 +SO2
Explanation / Answer
4) (rxn 1 - rxn2 gives the given rxn) => -9.7 +67.7 = 58 kJ
8)-152.4-64.4 = -216.8 kJ
17) aluminium sulfate because it have n=5 that is give 5 ions
23) strong refers to acid or base which give high concentration and almost completely ionize in water to give h+ or Oh- respectively.
24) Al2(CO2)3 and H2O
33) S since it itself get reduced (oxidation state decreses to -2 from 0) and bring oxidation (oxidation sate of Na increase to 1)
36) S (from 0 to +4)