Hydrogen Definition and 1000 Threads

Hydrogen and Oxygen "burn" Does anyone know the temperature at which this reaction becomes spontaneous? 2H2O--> 2H2 + O2 I can't find my book with thermodynamic data, but it should be cake for you guys. Thanks.

Can hydrogen be burned and used to drive an engine?

1. Consider Bohr Hydrogen atom with counter-clockwise electron orbit in the xy plane with intial position r(0)=-a0y. The angular frequency of the orbit is w. Derive an expression for the position of electron at a later time t, r(t) in terms of a0 , w, t, x, and y. Homework Equations...

Homework Statement The problem, along with a solution, is attached as an image file. Homework Equations The Attempt at a Solution I have done the problem which was very straight forward. One simply had to look up the Rn,l and then plug in the appropriate quantum numbers. Since for...

I've heard that the hydrogen atom that we originally learn about in QM that deals with the Coulomb force is an incomplete description. I'm having trouble understanding all of these effects. When describing the electron energy of the real Hydrogen atom, how do things like the zeeman effect...

Hello I have a question about the relationship between kinetic energy and temperature for the hydrogen. In my professor's note, there is written that: (1/2)m*(v^2) = (1/2)*K*T where m is the mass, K the costant and T the temperature in Kelvin. My doubt is in the fact that on...

Hi everyone, How can I solve hydrogen atom with discrete nonlinear schrödinger equation? Could you help me with the mathematics of that, please?

I've heard in the past something along the lines of "every atom in your body came from an exploding supernova". Yet, I can't see how that could be true when there is still such an abundance of hydrogen. Wouldn't any hydrogen in a star prevent it from reaching supernova stage? Assuming...

Homework Statement The first few lines of the Balmer series for atomic hydrogen lie at the wavelengths λ = 656.46, 486.27, 434.17, 410.29nm, ... Find a value for RH, the Rydberg constant for hydrogen. The ionization energy I is the minimum energy required to remove the electron. Find it from...

Homework Statement Calculate the volume required to hydrogenate 50g of trans-carveol at STP. Homework Equations PV=nRT m=152g The Attempt at a Solution I think I might have this one but just for clarification if I'm missing something. The amount of moles is 0.329 using the amount...

Hi. I'm a 3rd year undergraduate studying Applied Physics and I'm having some trouble with a problem concerning the Hydrogen Atom. This is my first post so please forgive the sloppy equations. Not really used to writing this stuff out without an equation editor handy! Anyway, the...

Intergalactic space travel and hydrogen "blasting" To travel by spaceship to Andromeda (2.5 million light years) within a life time (say 50 years) you would have to travel with a much greater Lorentz factor than LHC protons, 50000 versus 7500. The LHC supposedly can melt a metric ton of copper...

Hi there, Is hydrogen gas transparent to most radiation or is there a wavelength that interacts with hydrogen? I'm asking because I want to know if it's possible to "push" hydrogen in a vacuum with some kind of photons.

Q.) What would happen if a *reverse-Tokamak* was created, thus reversing the electromagnets to a negative charge and repelling electrons into each other instead of fusing hydrogen nuclei, what approximate temperature would need to be used and would it work? If so what would occur?

I noticed that the hydrogen spectral lines are grouped into 6 series and given a value for n. I also noticed that each series was named after its discoverer but "coincidentally?" falls into a specific region of the EM spectrum so the Lyman series (n=1) of lines are all in the UV region, the...

Homework Statement Dear all, I have to calculate the mean speed of hydrogen atoms, at temperature of 50K. Homework Equations Of course: <v>=\sqrt{\frac{8k_BT}{\pi m}} The Attempt at a Solution However, when I attempt to calculate it, m=\frac{2}{6.022x10^{23}} k_B=1.3807x10^{-23}...

Homework Statement Considering the n = 2 states of hydrogen: In the absense of an external field, the four j = 1/2 states are degenerate. Using degenerate pertubation theory, I am supposed to show that for a very weak field the Stark effect shifts the energy levels by \mp \sqrt{3}a_0 e...

Hi What does it take for hydrogen to form from protons and electrons? I have searched quite a bit and the only information that I have so far is from this webpage http://www.Newton.dep.anl.gov/askasci/phy00/phy00843.htm from the webpage ------------------------------ To form a hydrogen...

When white radiation is passed through a sample of hydrogen gas(atoms assumed actually) why are absorption lines observed in Lyman series only? The corresponding photon energy range for visible light(380-780nm) are 1.59-3.27eV which should cause transitions of electrons in the first excited...

Generally the working fluids in a power generating system is either water (steam) or air. This I imagine is because they are widely available fluids. The specific heats of these ranging from some 1 - 2 kJ/kg-K. For the sake of argument, let's assume that hydrogen or xenon are equally...

I wanted to know the average total energies of an isolated hydrogen atom's electron and proton separately. I came across a lot of equations I could try to use, but I figured I'd ask to see if this information has already been approximated. Thanks

Hi, I'm trying to figure out the solution for the ground state of the hydrogen-atom, however it is not going well. As far as i know, you can supress the angular dependence, because the states of hydrogen (or at least some of them) are spherically harmonic. This way the schr. equation just...

I recently had a probelm in QM to find the time evolution of a hydrogen prepared in a state with a wave function that is not an energy eigenfunction: specifically, psi = Y21*R2p where Y is then the D spherical harmonic. Of course, n=2 hydrogen doesn't have d oribtals. So the problem is I...

In the position representation, its true that we can use operators to represent the coulombic interaction between the proton and electron of a Hydrogen atom. I've never actually given any thought as to what the elements of such an operator would be (in matrix form of course). I know these...

Homework Statement An initial state is given: {\lvert {\psi(0)} \rangle} = \frac{1}{{\sqrt{3}}} \left( {\lvert {100} \rangle} + {\lvert {210} \rangle} + {\lvert {211} \rangle}\right) An L_z measurement is performed with outcome 0 at time t_0. What is the appropriate form for the ket...

I have had this question in the back of my mind for a while. Hydrogen has 1 proton and 1 electron, and the atom is electrically neutral. So that means that the electrical charge from the electron and the proton cancel each other out as they have equal/opposite charge. Then when you add another...

Hi, If the normalized 1D wave-function of hydrogen atom for n=1, l=0, m_l=0; \psi_{1s}(x)=\frac{1}{\sqrt{\pi} a_{0}^{3/2}}e^{-x/a_{0}} and probability distribution of wave-function, \mid\psi_{1s}(x)^2\mid so integration of rho over all x should give the number of electrons which is equal to...

I've searched google for some decent tables but couldn't find any. I'm trying to collect Normalized Spherical Harmonics Associated Legendre Polynomials Zeros of the Spherical Bessel Function Normalized Radius Function for the Hydrogen atom etc. I'm allowed a sheet with as much of these...

Hi I assume that two hydrogen atoms fuse together to form one helium atom during nuclear fusion. But what happens when other isotopes of hydrogen fuse together? What happens to two deuterium atoms when they fuse together? Tritium? I'm assuming that they would form an isotope of helium, but...

Thanks in advance for anybody who is kind enough to help me. No this isn't for my homework. I am not even enrolled in school. I am doing some calculations for personal research. But I need to know the ground state radius of a muonic hydrogen atom to help prove my theory. I already know the...

Find <nlm|(1/R)|nlm> for the hydrogen atom (nlm = 211), R is just the radial position Operator (X2 + Y2 + Z2)½.

Would someone tell me some website where I can find the relativistic treatment of the hydrogen atom using Dirac's Equation? I am not trying the find the method which uses Schrodinger's equation and adds as perturbations fine and hyperfine structures? Thank you. So far i have not find anything...

i know the rules of increasing and decreasing atom sizes down and across the periodic table. however, i have met one strange thing when i was given data to plot a graph. the hydrogen atom radius was stated as 32 pm, but helium was 50 pm. when i searched the internet, i found few websites...

What quantities appear in both the Schrodinger approach and the original Bohr theory of a hydrogen atom? Also, in what ways do the two approaches differ? I'm not sure which quantities appear in both approaches. My guess would be that it has something to do with the energy levels and angular...

A hydrogen atom is in the state \psi=Ar^2e^{-r/a}cos(\theta). I need to find lowest energy state and etc. Obviously normalize to find A, but I'm not seeing the obvious linear combination of wave functions; and I really don't think my instructor wants me to do several inner products (plus...

Is forming ammonium nitrate and hydrogen from air and water is possible. N2+3H2O > NH4NO3 +H2 Is this reaction exothermic? Ammonium nitrate has enthalpy of formation of -365.1

Homework Statement 1 mole of Hydrogen gas at 300 Kevin is contained in a thin walled copper container. In container #2 there is 1 mole of Neon gas also at 300 Kevin. The volume= 22.4 liters and surface area ,A = .476 m^2 The surroundings are at 100 deg Kelvin. The specific heat of H2= 5...

Here comes a pretty hard question, which not even my QM teacher has been able to answer. When we think about one hydrogen atom, and put it in an electric field along the z-axis \bar E = \bar e_z E. Then the potential for a hydrogen atom will look like this: U = -\frac{e^2}{4\pi \epsilon_0...

Hello, I don't know if this is the right place to post.. this is a self study question from Levine, it is told that is important but i have no clue in solving it .. The Balmer series corresponds to a set of emissions involving the electron in a hydrogen atom relaxing from a high energy...

Homework Statement 1 mole of Hydrogen gas at 300 Kelvin is in a thin walled copper container vol 22.4 liters surface area A = .476 M^2 In vessel #2 , 1 mole of Neon gas also 300 Kevin The specific heat of H2= 5 cal/mole (K) Thermal conductivity (k) H2 = .0433 cal/sec. converts to .00866...

According to the Brønsted-Lowry definition, a base is a compound that can -keyword- accept H+, and an acid anything that can give H+.

The 1s radial function of the wave function of H atom is: R10=2 a-3/2e-r/a ,where a = 5.29*10-11 meter but substituting a with its value,we will get R10 = 5.2*1015 *e(-1.89036*1010 r) and that is impossible if r=a and R(r)=1.9*1015 where is the problem ? What's more, the unit...

I'm studying particle physics now and am confused with all these terminologies.

Would the energy just be a multiple of how much bigger it is than electron?

Homework Statement A Hydrogen atom is initially in its ground state and then subject to a pulsed electric field E(t)=E_{0}\delta(t) along the z direction. We neglect all fine-structure and hyperfine-structure corrections. Homework Equations 1. It is important to use selection rules to avoid...

Why is there no allowed transition from the 2s^2 S_{\frac{1}{2}} state to the 2p^2 P_{\frac{3}{2}} state in the attached image? It seems to fulfill the selection rules \Delta l = \pm 1 and \Delta j = 0, \pm 1. This is for electric dipole transitions by the way.

Homework Statement use the RYDBERG formula to suggest a possible transition that would result in the observed wavelength Homework Equations Hydrogen - yellow wavelength about 600nm The Attempt at a Solution I used c= lambda x frequency(V) and found (V) to equal 5e14/second I then...

Looking for ideas that allow me to create Methane ( CH4 ) from gaseous hydrogen. This requires bonding one carbon atom to four hydrogen atoms, which should be simple enough, but there needs to be a minimum explosive danger. I know there are appliances to go the other way, but don't have the...

Homework Statement The potential energy V between the two hydrogen atoms ( mH = 1.672*10^(-24) g) in a hydrogen molecule is given by the empirical expression  V = V0 [ exp(-2a(r-r0)) - 2exp(-a(r-r0))] where V0 = 7*10^(-12) erg, a = 2*10^8 cm-1, r0 = 8*10^-9 cm. (a) Estimate the...

Are there any ionizing solutions for the hydrogen atom problem, where the electron breaks away from the proton?