एक ही अणु के दो संरूपणों (conformations) A और B की ऊर्जाएं तापमान T पर क्रमशः 5kBT और 9kBT हैं। बोल्ट्जमैन वितरण मानते हुए, संरूपण B में अणुओं का अंश कितना है?

The average energy of an ensemble of noninteracting particles is 1000 kBT at temperature T. Each particle can have energy of either 0 or kBT. The number of particles in the ensemble is closest to (where kB is the Boltzmann constant):

At 0 K, the molecule CO exists in two alternate arrangements (CO and OC) in the solid crystal. The value of its residual entropy per mole is approximately: (Given: k = 1.38 × 10−23 J K−1, NA = 6.02 × 1023 mol−1)