Question

Which of the following do(es) not represent $\Delta H$ formation of the product?

• A. $\frac{1}{2}{H}_2\left(g\right)+\left(aq\right)\to H^{+}\left(aq\right)+e^{-}$
• B. $\frac{2}{3}{O}_3\to O_2\left(g\right)$
• C. $N{H}_4^{+}\left(g\right)+C{l}^{-}\left(g\right)\to N{H}_{4}Cl\left(s\right)$
• D. $P_4\left(black\right)+5O_2\left(g\right)\to P_4{O}_{10}\left(s\right)$
• E. Reaction representing $\Delta H_{combustion}$ of $C$ (graphite).

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A $\frac{1}{2}{H}_2\left(g\right)+\left(aq\right)\to H^{+}\left(aq\right)+e^{-}$
B $\frac{2}{3}{O}_3\to O_2\left(g\right)$
C $N{H}_4^{+}\left(g\right)+C{l}^{-}\left(g\right)\to N{H}_{4}Cl\left(s\right)$
D $P_4\left(black\right)+5O_2\left(g\right)\to P_4{O}_{10}\left(s\right)$