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4.23. Determine the standard heat of each of the following reactions at 25C : (a) N2(g)+3H2(g)2NH3(g) (b) 4NH3(g)+5O2(g)4NO(g)+6H2O(g) (c) 3NO2(g)+H2O(l)2HNO3(l)+NO(g) (d) CaC2(s)+H2O(l)C2H2(g)+CaO(s) (e) 2Na(s)+2H2O(g)2NaOH(s)+H2(g) (f) 6NO2(g)+8NH3(g)7N2(g)+12H2O(g) (g) C2H4(g)+21O2(g)(CH2)2O(g) (h) C2H2(g)+H2O(g)(CH2)2O(g) (i) CH4(g)+2H2O(g)CO2(g)+4H2(g) (j) CO2(g)+3H2(g)CH3OH(g)+H2O(g) (k) CH3OH(g)+21O2(g)HCHO(g)+H2O(g) (l) 2H2S(g)+3O2(g)2H2O(g)+2SO2(g) (m) H2S(g)+2H2O(g)3H2(g)+SO2(g) (n) N2(g)+O2(g)2NO(g) (o) CaCO3(s)CaO(s)+CO2(g) (p) SO3(g)+H2O(l)H2SO4(l) (q) C2H4(g)+H2O(l)C2H5OH(l) (r) CH3CHO(g)+H2(g)C2H5OH(g) (s) C2H5OH(l)+O2(g)CH3COOH(l)+H2O(l) (t) C2H5CH:CH2(g)CH2:CHCH:CH2(g)+H2(g) (u) C4H10(g)CH2:CHCH:CH2(g)+2H2(g) (w) 4NH3(g)+6NO(g)6H2O(g)+5N2(g) (x) N2(g)+C2H2(g)2HCN(g) (y) C6H5C2H5(g)C6H5CH:CH2(g)+H2(g) (z) C(s)+H2O(l)H2(g)+CO(g) 4.24. Determine the standard heat for one of the reactions of Prob. 4.23: part (a) at 600C, part (b) at 50C, part (f) at 650C, part (i) at 700C, part (j) at 590(F), part (l) at