question_answer

Consider the following processes \[\Delta H\,(kJ/\,mol)\]                                                        [AIPMT (M) 2011]

\[1/2A\to B\]                  + 150

\[3B\to 2C+D\]              - 125

\[E+A\to 2D\]                + 350

For \[B+D\to E+2C,\Delta H\] will be

A)  525 kJ/mol    

B)       - 175 kJ/mol

C)  - 325 kJ/mol    

D)       325 kJ/mol

Correct Answer: B

Solution :

(i)

(ii)

(iii)

Bywe have