Given the balanced equation:

4Fe (s) + 3O2 (g) = = >2Fe2O3 (s) + 1640 kJ

Which phrase best describes this reaction?

(1) endothermic with DH = + 1640 kJ

(2) endothermic with DH = - 1640 kJ

(3) exothermic with DH = + 1640 kJ

(4) exothermic with DH = - 1640 kJ

Question

Milton Schwartz

Chemistry

27 January, 04:24

Given the balanced equation:

4Fe (s) + 3O2 (g) = = >2Fe2O3 (s) + 1640 kJ

Which phrase best describes this reaction?

(1) endothermic with DH = + 1640 kJ

(2) endothermic with DH = - 1640 kJ

(3) exothermic with DH = + 1640 kJ

(4) exothermic with DH = - 1640 kJ

+1

Answers (1)

Know the Answer?

Anderson Shaffer · Answer 1

The answer is (4) exothermic with ΔH = - 1640 kJ. The 1640 kJ energy is at the right side of equation means that it releases energy. The enthalpy change means the energy of production minus the energy of reactants. If it is exothermic, the ΔH < 0.

Given the balanced equation:4Fe (s) + 3O2 (g) = = >2Fe2O3 (s) + 1640 kJWhich phrase best describes this reaction?(1) endothermic with DH = + 1640 kJ(2) endothermic with DH = - 1640 kJ(3) exothermic with DH = + 1640 kJ(4) exothermic with DH = - 1640 kJ

Given the balanced equation:

4Fe (s) + 3O2 (g) = = >2Fe2O3 (s) + 1640 kJ

Which phrase best describes this reaction?

(1) endothermic with DH = + 1640 kJ

(2) endothermic with DH = - 1640 kJ

(3) exothermic with DH = + 1640 kJ

(4) exothermic with DH = - 1640 kJ