... mol−1) C3H6(g) + H2(g) → C3H8(g) − 124 C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(l) 22 20 H2O(l) → H2 (g ) + 12 O2 (g ) +28 6 C3H6 (g ) + O2 (g ) → CO2 (g ) + H2O(l) 20 58 Self-test 2C.3 Calculate the ... propene 2C.3(b) From the following data, determine ΔfH< for diborane, B2H6(g), at 29 8 K: (3) H2(g ) + 12 O2 (g ) → H2O(g) (1) H2(g ) + I2(s) → HI(g) (3) HI(g) + O2(g ) → I2 (s) + H2O(g) 2C.3(a) ... = + 52. 96 kJ mol −1 (2) H2(g ) + O2(g) → H2O(g) ∆ r H < = −483.64 kJ mol −1 2C.7(a) For the reaction C2H5OH(l) + 3 O2(g) → 2 CO2(g) + 3 H2O(g), ΔrU...