Calculate the energy required to excite 1 litre of `H_2` gas at 1 atm and 298 K to the first 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)` .

Explanation

To calculate the energy required to excite 1 liter of \( H_2 \) gas at 1 atm and 298 K to the first excited state of atomic hydrogen, we will follow these steps:

### Step 1: Calculate the number of moles of \( H_2 \)

Using the Ideal Gas Law:
\[ PV = nRT \]
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