Determine which of the following reactions at constant pressure represents surroundings that do work on the system:
I. `4NH_(3)(g)+7O_(2)(g)rarr4NO_(2)(g)+6H_(2)O(g)`
II. `CO(g)+2H_(2)(g)rarrCH_(3)OH(l)`
III. `C(s,"graphite")+H_(2)O(g)rarrCO(g)+H_(2)(g)`
IV. `H_(2)OrarrH_(2)O(l)`

Determine which of the following reactions at constant pressure represent surrounding that do work on the system environment : (P) 4NH_(3)(g) + 7O_(2)(g) to 4 NO_(2) (g) + 6H_(2)O(g) (Q) CO(g)+ 2H_(2)(g) to CH_(3)OH(l) (R) C("s,graphite")+H_(2)O(g) to CO(g)+H_(2)(g) (S) H_(2)O(s) to H_(2)O(l)

Determine which of the following reactions at constant pressure represent surrounding that do work on the system environment : (P) 4NH_(3)(g) + 7O_(2)(g) to 4 NO_(2)+ 6H_(2)O(g) (Q) CO.O(g)+ 2H_(2)(g) to CH_(3)OH(l) (R) C("s,graphite")+H_(2)O(g) to CO(g)+H_(2)(g) (S) H_(2)O(s) to H_(2)O(l)

Determine which of the following reactions at constant pressure represent surrounding that do work on the system environment : (P) 4NH_(3)(g) + 7O_(2)(g) to 4 NO_(2)+ 6H_(2)O(g) (Q) CO.O(g)+ 2H_(2)(g) to CH_(3)OH(l) (R) C("s,graphite")+H_(2)O(g) to CO(g)+H_(2)(g) (S) H_(2)O(s) to H_(2)O(l)

The differential rate law for the reaction, 4NH_3(g)+5O_2(g)rarr4NO(g)+6H_2O(g)

The differential rate law for the reaction, 4NH_3(g)+5O_2(g)rarr4NO(g)+6H_2O(g)

For the following three reactions I, II and III, equilibrium constants are given : I. H_(2)(g) + 1/2O_(2)(g) rarr H_(2)O ....K_(1) II. C_(2)H_(4)(g) + 3O_(2)(g) rarr 2CO_(2)(g) + 2H_(2)O(g) ....K_(2) III. C_(2)H_(6)(g) + 7/2O_(2)(g) rarr 2CO_(2)(g) + 3H_(2)O(g) ...K_(3) IV. C_(2)H_(4) + H_(2) rarr C_(2)H_(6) ...K_(4) Which of the following relations is correct?

In which of the following changes at constant pressure is work done by system on surrounding? By the surrounding on system ? {:("Initial state",,"Final state"),("(i) "H_(2)O(g),to,H_(2)O(l)),("(ii) "H_(2)O(s),to,H_(2)O(g)),("(iii) "H_(2)O(l),to,H_(2)O(s)),("(iv) "3H_(2)(g)+N_(2)(g),to,2NH_(3)(g)),("(v) "CaCO_(3)(s),to,CaO(s)+CO_(2)(g)):}

In which of the following reactions At 25^(@)C , does the standard enthalpy change correspond to the standard enthalpy of formation of H_(2)O(l) ? Give reasons. (i) H_(2)(g) +(3)/(2)O_(3)(g) to H_(2)O(l) (ii) H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(l) (iii) 2H(g)+O_(2)(g) to H_(2)O(l) .