How Much Energy Do CO Molecules Need for a Rotational Transition?

AI Thread Summary
CO molecules require light absorption at a frequency of 1.16 x 10^11 Hz to transition from the lowest to the next highest rotational energy level. The energy for this transition is calculated using the equation E = hv, resulting in approximately 7.69 x 10^-23 J per molecule. When converted to kJ/mol, this energy amounts to about 0.0463 kJ/mol. The calculations confirm that the correct answer aligns with the derived value. This highlights the specific energy requirements for rotational transitions in CO molecules.
Soaring Crane
Messages
461
Reaction score
0
The absorption of light of frequency 1.16 x 10^11 Hz is required for CO molecules to go from the lowest rotational energy level to the next highest rotational energy level. Determine the energy for this transition in kJ/mol. h = 6.626 x 10-34 J s
a. 7.69 x 10-23 kJ/mol
b. 949 kJ/mol
c. 46.3 kJ/mol
d. 0.0463 kJ/mol
E = hv
= (1.16*10^11 Hz)(6.626*10^-34 J*s)
= 7.686 *10^-23 J = 7.69*10^-26 kJ* (6.02*10^23 molecules/ 1 mol) = 0.04629 kJ/mol
Thanks.
 
Physics news on Phys.org
Looks good to me.
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

Angular velocity of an oxygen molecule.
Replies
7
Views
7K
Calculating IR Energy: 1.614 x 107 MHz
Replies
2
Views
10K
Exercise about determining energy of light that breaks bonds
Replies
3
Views
4K
Basic quantum physics, Balmer series
Replies
1
Views
2K
Wavelength, Frequency, and Planck's Constant
Replies
6
Views
24K
Photons, wavelengths, and ionization energy
Replies
1
Views
19K
Quantum Question and Binding Energy Question
Replies
3
Views
7K
How Do You Calculate the Kinetic Energy of CO, CO2, and SO3 at 276 K?
Replies
1
Views
5K
How does a black body emit as much energy as it absorbs?
Replies
5
Views
2K
Questions on Internal Energy and Specific Heat Capacities
Replies
3
Views
5K

Hot Threads

Recent Insights

Back
Top