What conclusion can be drawn from the following reactions about the nature of oxides?
`(1) 4Na(s) + O_2(g)rarr 2Na_(2)O(s); Na_(2)O(s) + H_(2)O(l) rarr 2NaOH(aq)`
`(2) S(s) + O_2(g)rarr SO_(2)(g); SO_(2)(g) + H_(2)O(l) rarr H_(2)SO_(4)(aq)`

For the system S (s) + O_(2)(g) rarr SO_(2)(g) ?

Give the n factors for the following changes - (i) Na_(2) CO_(3) rarr NaHCO_(3) (ii) Al_(2) (SO_(4))_(3) rarr Al(OH)_(3) (ii) Na_(2) S_(2) O_(3) rarr S_(4) O_(6)^(-2)

Find the heat of reaction 2Na(s) +1//2O_(2)(g) rarr Na_(2)O(s) Given: Na_(2)O(s) +H_(2)Orarr 2NaOH, DeltaH =- 56 kcal 2Na + 2H_(2)O rarr 2NaOh +H_(2),DeltaH =- 88 kcal H_(2) +1//2O_(2)rarr H_(2)O, DeltaH =- 68 kcal

For each reaction, wheter the sign of Delta S (entropy) is positive or negative ? (a) Ni(s)+4CO(g)rarr Ni(CO)_(4)(g) (b) 4Fe(s)+3O_(2)(g)rarr 2Fe_(2)O(s) (c ) H_(2)(g)+S(s)rarr H_(2)S(g) (d) 2NO(g)+O_(2)(g)rarr 2NO_(2)(g)

Calculate in kJ for the following reaction : C(g) + O_(2)(g) rarr CO_(2)(g) Given that, H_(2)O(g) + C(g) + H_(2)(g) , Delta H = +131 kJ CO(g) + 1/2 O_(2)(g) rarr CO_(2)(g), " " Delta H = -242 kJ H_(2)(g) + 1/2 O_(2)(g) rarr H_(2)O(g), " "DeltaH = -242 kJ

Na_(2)S+H_(2)SO_(4)("Conc.")to S darr+SO_(2)+Na_(2)SO_(4)

Na_(2)S+H_(2)SO_(4)("Conc.")to S darr+SO_(2)+Na_(2)SO_(4)

Classify the following redox reactions: a. N_(2)(g)+O_(2)(g)rarr 2NO(g) b. 2Pb(NO)_(3)(s)rarr2PbO(s)+2NO_(2)(g)+(1)/(2)O_(2)(g) c. NaH(s)H_(2)O(l)rarr NaOH(aq)+H_(2)(g) d. 2NO_(2)(g)+2overset(ө)OH(aq)rarrNO_(2)^(ө)(aq)+NO_(3)^(ө)(aq)+H_(2)O(l)

Write balanced net ionic equations for the following reactions in basic solution: (a) H_(2)O_(2)(aq)+ClO_(4)^(Ө)(aq) rarr ClO_(2)^(Ө)(aq)+O_(2)(g) (b) ( c) Cu(OH)_(2)(s) + N_(2)H_(4)(aq) rarr Cu(s)+N_(2)(g) (d) MnO_(4)^(Ө) + IO_(3)^(Ө)(aq)rarr MnO_(2)(s) + IO_(4)^(Ө)(aq)

Complete the following reactions : Na_(2)O(s)+H_(2)O(l)to