4 Na(s) + O2(g) --> 2 Na2O(s) ΔH0 = - 828 kJ This reaction is _______,...

Question

Question

4 Na_(s) + O_2(g) --> 2 Na₂O_(s) ΔH⁰ = - 828 kJ

This reaction is _______, and therefore heat is_____ by the reaction.

a)exothermic, absorbed

b)exothermic, released

c)endothermic, absorbed

d)endothermic, released

Answer 1

Answer #1

4 Na(s) + O2(g) --> 2 Na2O(s) ΔH0 = - 828 kJ

This reaction is exothermic and therefore heat is released_ by the reaction.

As Delta H is negative.

Hence, b) exothermic, released is answer.

Answer 2

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