A2.5-l tank initially is empty, and we want to fill it with 10 g of ammonia. the ammonia comes from a line with saturated vapor at 25◦c. to achieve the desired amount, we cool the tank while we fill it slowly, keeping the tank and its content at 30◦c. find the final pressure to reach before closing the valve and the heat transfer?
gullies and stream-likke channels
there is a difference between the energy of their ground electronic state, where no electrons have been excited by an incoming photon, and their excited electronic state, where at least one electron has been moved to a higher orbital than it normally occupies. the difference between these 2 states determines how much energy they absorb when they get excited and emit when they relax (go back to their ground state). energy of light absorbed or emitted =planck's constant*frequency of light absorbed or emitted. frequency of light = speed/wavelength.