Question

For which of the processes is $\Delta H^{o}$ negative.

• A. $H_{2}(g) + Br_{2}(g) \rightarrow 2HBr(g)$
• B. $\Delta G$
• C. $Ag^{+}$
• D. $NaCl$

Answer 1

Answer: (B)

$\Delta G$

Answer 2

Processes (1) and (3) take place with the increase of no. of moles of gaseous species and hence the disorder or entropy increases. (2) on increasing pressure, disorder or randomness decreases and so also the entropy (4) is endothermic process and $373K$is positive.