The boiling points of pure HF, HCl, HBr and HI are -20, -85, -66 and -34...

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The boiling points of pure HF, HCl, HBr and HI are -20, -85, -66 and -34...

The boiling points of pure HF, HCl, HBr and HI are -20, -85, -66 and -34 degrees C, . Identify the trends in bond polarity and dispersion forces along this series.

(i) Use this information to assess the relative strengths of these two effects in this case.

(ii) Suggest a reason for the anomalous behaviour of HF.

(iii) Calculate (a) the total number of atoms in a 3.2cm3 sample of pure liquid HCl, (b) the number of moles of HCl in 1 L of pure liquid. Note that the density of liquid HCl is 1.49 g cm-3.

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HE HU IAP AL (Dipde-Dipole altraction) H-bonding randerwaal force of of attraction increases since size excreares dehu bp: не

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