A) \[{{x}_{1}}+\frac{{{x}_{2}}}{2}-{{x}_{3}}+{{x}_{4}}\]
B) \[2{{x}_{3}}-{{x}_{1}}-\frac{{{x}_{2}}}{2}-{{x}_{4}}\]
C) \[{{x}_{1}}+\frac{{{x}_{2}}}{2}-2{{x}_{3}}-{{x}_{4}}\]
D) \[{{x}_{1}}+\frac{{{x}_{2}}}{2}-2{{x}_{3}}+{{x}_{4}}\]
Correct Answer: C
Solution :
\[{{H}_{2}}\,\,+\,\,\frac{1}{2}{{O}_{2}}\,\to \,\,{{H}_{2}}O\,\,\,\,\,\,\,\Delta H\,\,=\,\,?\] \[\Delta H\,\,=\,\,{{\left( B.E. \right)}_{R}}\,\,-\,\,{{\left( B.E. \right)}_{p}}\] \[\Delta H=\left[ {{x}_{1}}+\frac{1}{2}\,\,\times \,\,{{x}_{2}} \right]\,\,-\,\,\left[ 2{{x}_{3}} \right]\text{ }\,\,i.e.\text{ }for\text{ }{{H}_{2}}O\,(\ell )\] Adding \[\underset{(\ell )}{\mathop{{{H}_{2}}O}}\,\,\,\to \,\,\text{ }\underset{(g)}{\mathop{{{H}_{2}}O}}\,\,\text{ }\Delta H={{x}_{4}}\]You need to login to perform this action.
You will be redirected in
3 sec