Question

Consider the formation of formation of chlorine and water vapor,H2O(g), by the reaction of hydrogen chloride with oxygen:
HCl(g) + 1/4 O2(g) 1/2 Cl2(g) + H2O(g) H = -28.6 kJ

(a) What is the enthalpy change for the reverse reaction?

Hreverse = kJ/mol.




(b) Balance the forward reaction with whole-number coefficients.What is H for the reaction represented by this equation?

H = kJ/mol.




(c) Which is more likely to be thermodynamically-favored, theforward reaction or the reverse reaction?






(d) If the (forward) reaction were written to produce liquid water,H2O(l), instead of water vapor, would you expect the magnitude of Hto increase (become more positive), decrease (become morenegative), or stay the same?

H should .