C 6 H 12 O 6 (s) + 6 O 2 (g) → 6 CO 2 (g) + 6 H 2 O(l) (25 o , 1 Atm) ΔH m = –2808 kJ (1) Here the sign of ΔH m (delta H subscript m) tells us whether heat energy is released or absorbed when the reac...C 6 H 12 O 6 (s) + 6 O 2 (g) → 6 CO 2 (g) + 6 H 2 O(l) (25 o , 1 Atm) ΔH m = –2808 kJ (1) Here the sign of ΔH m (delta H subscript m) tells us whether heat energy is released or absorbed when the reaction occurs and the value enables us to find the actual quantity of energy involved.
A 1-2 g sample of food is sealed in a heavy walled steel cylinder (about 4" in diameter and 7" high), shown in the center of the Figure, which is then filled with pure oxygen at 30-40 atmospheres pres...A 1-2 g sample of food is sealed in a heavy walled steel cylinder (about 4" in diameter and 7" high), shown in the center of the Figure, which is then filled with pure oxygen at 30-40 atmospheres pressure, and immersed in a few liters of water. The only way the problem can he avoided is for ΔH m of the reverse reaction to be equal in magnitude but opposite in sign from ΔH m of the forward reaction.
