question_answer 54)

Which of the following reactions will get affected by increasing the pressure? Also, mention whether change will cause the reaction to go into forward or backward direction? (i) \[COC{{l}_{2}}(g)\rightleftharpoons CO(g)+C{{l}_{2}}(g)\] (ii) \[C{{H}_{4}}(g)+2{{S}_{2}}(s)\rightleftharpoons C{{S}_{2}}(g)+2{{H}_{2}}S(g)\] (iii) \[C{{O}_{2}}(g)+C(s)\rightleftharpoons 2CO(g)\] (iv)\[2{{H}_{2}}(g)+CO(g)\rightleftharpoons C{{H}_{3}}OH(g)\] (v) \[CaC{{O}_{3}}(s)\rightleftharpoons Cao(s)+C{{O}_{2}}(g)\] (vi)\[4N{{H}_{3}}(g)+5{{O}_{2}}(g)\rightleftharpoons 4NO(g)+6{{H}_{2}}O(g)\]  

Answer:

(i) \[\Delta {{n}_{g}}=2-1=1\,\,\,\,\,;\,\,\,\,\Delta {{n}_{g}}>0\] (Backward shift by rise in pressure) (ii) \[\Delta {{n}_{g}}=3-3=0\] (No effect of pressure change) (iii) \[\Delta {{n}_{g}}=2-1=1,\,\,\,\,\,\,\,\Delta {{n}_{g}}>0\] (Backward shift by rise in pressure) (iv)\[\Delta {{n}_{g}}=1-3=-2,\,\,\,\Delta {{n}_{g}}0\] (Backward shift by rise in pressure)