Në cilin nga barazimet termokimike më poshtë, entalpia e reaksionit është edhe entalpi standarde e formimit?
A)
\[ \text{CaO}_{(ng)} + \text{H}_2\text{O}_{(l)} \rightarrow \text{Ca(OH)}_2{}_{(uj)} \]
\[ \Delta H^\circ = -63.3\ \text{kJ} \]
B)
\[ \text{CO}_{(g)} + \frac{1}{2}\text{O}_2{}_{(g)} \rightarrow \text{CO}_2{}_{(g)} \]
\[ \Delta H^\circ = -283\ \text{kJ} \]
C)
\[ \text{S}_{(ng)} + \text{O}_2{}_{(g)} \rightarrow \text{SO}_2{}_{(g)} \]
\[ \Delta H^\circ = -296.9\ \text{kJ} \]
D)
\[ \text{H}_2{}_{(g)} + \text{Cl}_2{}_{(g)} \rightarrow 2\text{HCl}_{(g)} \]
\[ \Delta H^\circ = -184.6\ \text{kJ} \]