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Per NCERT §9.2.4, the STAGGERED conformation of ethane is more stable than the eclipsed conformation by approximately which energy?
A125 kJ/mol
B250 kJ/mol
C1.25 kJ/mol
D12.5 kJ/mol
Answer & Solution
Correct answer: D. 12.5 kJ/mol
NCERT §9.2.4: torsional strain barrier = 12.5 kJ/mol. Easily overcome at room T, so rotation is essentially free in practice.
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