Answer:
35.1 kJ/mol is the expected value for the heat of sublimation of acetic acid.
Explanation:
[tex]CH_3COOH(l)\rightarrow CH_3COOH(g)[/tex]..[1]
Heat of vaporization of acetic acid = [tex]H^o_{vap}=24.3 kJ/mol[/tex]
[tex]CH_3COOH(s)\rightarrow CH_3COOH(l)[/tex]..[2]
Heat of fusion of acetic acid = [tex]H^o_{fus}=10.8 kJ/mol[/tex]
Heat of sublimation of acetic acid = [tex]H^o_{sub}=?[/tex]
[tex]CH_3COOH(s)\rightarrow CH_3COOH(g)[/tex]..[3]
[1] + [2] = [3] (Hess's law)
[tex]H^o_{sub}=H^o_{vap}+H^o_{fus}[/tex]
[tex]=24.3 kJ/mol+10.8 kJ/mol=35.1 kJ/mol[/tex]
35.1 kJ/mol is the expected value for the heat of sublimation of acetic acid.
