Recitation
Tuesday, April 4, 2023
1) When 10.0 L of H2O2(g) at 0.624 atm and 25.0 oC reacts with 10.0 g of C2H4(g) to
form C2H6O2(g) at 100 % yield, 79.8 kJ of energy is released. Use this information and
data provided below to calculate the bond dissociation energy of the O-to-O single bond
in kJ/mol. (8 pts)
Bond Energy (H—O) = 460. kJ/mol
Bond Energy (H—C) = 410. kJ/mol
Bond Energy (C—C) = 348 kJ/mol
Bond Energy (C—O) = 358 kJ/mol
Bond Energy (C = C) = 611 kJ/mol
2) A 54 cm3 ice cube at -25.0 C is added to a thermally insulated container with 400.0
mL H2O(l) at 32.0 C. Calculate the final temperature in the container and what state(s)
of matter will be present?
Densities of H2O: solid, 0.917 g/cm3, and liquid, 0.998 g/cm3 .