According to quantum mechanics, the rotational energy levels of a rigid diatomic molecule are r +1), r=0,1,2,.. Er = where I is the molecular moment of inertia. Level r has degeneracy g, = 2r+1. Assuming ideal gas behaviour, find the most populated rotational level of CO at 20°C. The molecular moment of inertia of CO is I = 1.46 × 10-48 kg m².

According to quantum mechanics, the rotational energy levels of a rigid diatomic molecule are r +1), r=0,1,2,.. Er = where I is the molecular moment of inertia. Level r has degeneracy g, = 2r+1. Assuming ideal gas behaviour, find the most populated rotational level of CO at 20°C. The molecular moment of inertia of CO is I = 1.46 × 10-48 kg m².