Consider the following reaction. 2H2 + O2 —> 2H2O. Change of H(rxn) = -484kJ.?

Which answer best describes the transfer heat that occurs when 1.5o mol of H2 reacts?

a. 726 kJ absorbed

b. 363 kJ absorbed

c. 484 kJ absorbed

d. 726 kJ released

e. 363 kJ released

f. 484 kJ released


1 Answer

  • Because delta H is negative we know the reaction is exothermic (heat is released).

    Since we have less H2 than 2 mole this will be less than 484kJ. Therefore your answer is (e) 363 kJ released.

    Enjoy 🙂

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