When One Mole of Gaseous Hydrogen Peroxide,H₂O₂,is Made from Hydrogen $\rightarrow$

Multiple Choice

When one mole of gaseous hydrogen peroxide,H₂O₂,is made from hydrogen and oxygen gases,the enthalpy change is -136 kJ.Which of the following correctly represents the thermochemical equation?
(i) H₂(g) + O₂(g) $\rightarrow$ H₂O₂(g) + 136 kJ
(ii) H₂(g) + O₂(g) + 136 kJ $\rightarrow$ H₂O₂(g)
(iii) H₂(g) + O₂(g) $\rightarrow$ H₂O₂(g) ?0?H = -136 kJ
(iv) H₂(g) + O₂(g) $\rightarrow$ H₂O₂(g) ?0?H = +136 kJ

A) i only
B) ii only
C) iii only
D) i and iii
E) ii and iv