Question

If 2.6 moles of CO react with excess O₂, how many kJ of energy are released by the reaction 2CO(g)+O₂(g)→2CO₂(g)(ΔH= -560.0 kj/mol)?

a. -1456.0 kJ
b. -2184.0 kJ
c. -3640.0 kJ
d. -7280.0 kJ

Answer 1

The energy released by the reaction of 2.6 moles of CO can be calculated using the stoichiometry and the given enthalpy change value. The correct answer is -7280.0 kJ.

Step-by-step explanation:

To calculate the amount of energy released by the reaction, we need to use the stoichiometry of the reaction and the given enthalpy change value (ΔH). From the balanced chemical equation, we can see that 2 moles of CO react to form 2 moles of CO₂.

Therefore, the enthalpy change for the reaction of 1 mole of CO will be half of the given value, -560.0 kJ/mol ÷ 2 = -280.0 kJ/mol. To find the energy released by 2.6 moles of CO, we multiply the enthalpy change by the number of moles: -280.0 kJ/mol × 2.6 mol = -728.0 kJ. Therefore, the correct answer is option d. -7280.0 kJ.