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Calculate the energy required to excite 1 litre of H_2gas at 1 atm and 298 K to thefirst excited state of atomic hydrogen. The energy for the dissociation of H-H bonds is 436 kJ "mol"^(-1) . Rydberg constant for H = 109679 cm^(-1) , h = 6.626 xx 10^(-34) Js and C = 3 xx 10^8 m s^(-1) . |
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Answer» Solution :Mole of H = 2 x mole `H_2 = 2 xx(PV)/(RT)` Energy to EXCITE 1 H atom `=hv = (HC)/(lamda) = hcR ((1)/(n_1) - (1)/(n_2))` Total energy = energy to break H-H bonds + energy to excite H atom 98.19kJ |
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