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← ScienceWhich outcome occurs when a nonpolar molecular gas undergoes rapid adiabatic expansion?
A)Temperature decrease due to gas expansion✓
B)Molecular dissociation from increased entropy
C)Spectral shift by Doppler broadening
D)Electromagnetic radiation from ionisation
💡 Explanation
When a nonpolar molecular gas expands adiabatically (no heat exchange) the gas performs work, decreasing the average kinetic energy of its molecules, and thus its temperature. Therefore temperature decreases results, rather than dissociation, spectral shifts, radiation, which involve different mechanisms at higher energies or conditions.
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