When sodium and chlorine react to form sodium chloride NaCl) , 411 kJ per mole of NaCl is given off. To break up 1 mole of NaCl into sodium and chlorine requires
A) less than 411 kJ.
B) 411 kJ.
C) more than 411 kJ.
D) any of the above, depending on the circumstances.
Correct Answer:
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