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Per NCERT §5.2.1, at CONSTANT VOLUME (ΔV = 0), the first law simplifies to which?
AΔU = w
BΔU = qp
CΔU = q_V — heat absorbed at constant volume equals change in internal energy
DΔU = 0
Answer & Solution
Correct answer: C. ΔU = q_V — heat absorbed at constant volume equals change in internal energy
Per NCERT §5.2.1, ΔV=0 ⇒ w=0 ⇒ ΔU = q_V. This is why bomb calorimetry directly gives ΔU.
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