$\overline{){\mathbf{\u2206}}{\mathbf{S}}{\mathbf{=}}\frac{\mathbf{\u2206}\mathbf{H}}{\mathbf{T}}}$

**Calculate ∆S _{fus} and ∆S_{vap} for Na.**

$\mathbf{\u2206}{\mathbf{S}}_{\mathbf{fus}}\mathbf{=}\frac{\mathbf{\u2206}{\mathbf{H}}_{\mathbf{fus}}}{{\mathbf{T}}_{\mathbf{m}}}$

1. Using the following data,

Calculate ∆S_{fus} and ∆S_{vap} for Na.

ΔS_{fus} = J•K^{-1}•mol^{-1}

ΔS_{vap} = J•K^{-1}•mol^{-1}

2. Using the following data,

calculate the ΔS_{fus} and ΔS_{vap} for HBr.

ΔS_{fus} = J/(K•mol)

ΔS_{vap} = J/(K•mol)

Determine the entropy change when 6.60 mol of HBr(l) boils at atmospheric pressure.

ΔS = J/K

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