Answer to Question #183911 in General Chemistry for Anita

Question

Use the data below to find the standard heat of formation for B2H6 (g).

H2(g) + 1⁄2O2(g) → H2O(g) ΔH=−241.8kJ

2B (g) + 3/2 O2 (g) → B2O3 (s) ΔH = −1273.5 kJ

B2H6(g) + 3O2(g) → B2O3(s) + 3H2O(g) ΔH=−2039.9kJ

1. A) +41.0 kJ
2. B) −41.0 kJ
3. C) −1760 kJ
4. D) +1760 kJ
5. E) +525 kJ

Answer 1

standard heat of formation for B2H6 (g) = 41kJ

1. A) +41.0 kJ