At `27^@C` and 1 atm `N_2O_4` is 20% dissociated into `NO_2`. Find (a) `K_p` (b) the per cent dissociation at `27^@C` and a total pressure of 0.1atm.

Explanation

To solve the problem step by step, we will first calculate \( K_p \) for the dissociation of \( N_2O_4 \) into \( NO_2 \) at 27°C and 1 atm, and then we will find the percentage dissociation at a total pressure of 0.1 atm.

### Step 1: Write the balanced equation for the dissociation reaction
The dissociation of \( N_2O_4 \) can be represented as:
\[ N_2O_4 \rightleftharpoons 2 NO_2 \]

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