Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-numerical-Medium-Class 11
What is the enthalpy change when 2 moles of dihydrogen are completely atomized to form gaseous hydrogen atoms?
A
870 kJ mol–1
B
217.5 kJ mol–1
C
435 kJ mol–1
D
108.4 kJ mol–1
Correct Answer
Option A
Detailed Explanation
The enthalpy of atomization for breaking one mole of H–H bonds in dihydrogen is given as 435 kJ mol–1. Therefore, for 2 moles of dihydrogen, the enthalpy change is 2 × 435 kJ mol–1 = 870 kJ mol–1.
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