Question

The combustion of coal with oxygen forms CO2 and releases 94. kcal of energy.

C(s) + 02(g) -+ CO2 (g) kcal AH =- 94.

How much energy is released when 6.7 mol of O2 reacts? Be sure your answer has the correct number of significant figures.


mol



kcal of energy released

Answer 1

There is a 1:1 mole ratio between O2 and energy released in the reaction. Therefore, 6.7 mol of O2 will release 6.7 kcal of energy.

Therefore, 6.7 mol of O2 releases 6.7 kcal of energy.