3
AssignmentMultiple Choice
Thermochemical Equations
Question 3 • Foothill-B Period-Chemistry-26/27B
The synthesis reaction to form boron hydride is: 2B(s) + 3H(g) BH(g), H = +36 KJ. What is the enthalpy value for the manipulated reaction: 1/2BH(g) B(s) + 3/2H(g)?
Answer
A
–18 KJB
–36 KJC
+18 KJD
+72 KJ