question_answer 1)

  Represent the potential energy/enthalpy change in the following processes graphically. (a) Throwing a stone from the ground to roof. (b) \[\frac{1}{2}{{H}_{2}}(g)+\frac{1}{2}C{{l}_{2}}(g)\rightleftharpoons HCl(g);\]\[{{\Delta }_{r}}{{H}^{O-}}=-92.32kJ\,mo{{l}^{-1}}\] In which of the processes potential energy/enthalpy change is contributing factor to the spontaneity?

Answer:

  (a) (b) \[\Delta H=-ve\], exothermic process