4.1 Watter verbinding in die tabel is 'n gas by kamertemperatuur?
4.2 Definieer die term homoloë reeks - NSC Physical Sciences - Question 4 - 2016 - Paper 2
Question 4
4.1 Watter verbinding in die tabel is 'n gas by kamertemperatuur?
4.2 Definieer die term homoloë reeks.
4.3 In Type Van der Waalskrag word tussen molekules van v... show full transcript
Worked Solution & Example Answer:4.1 Watter verbinding in die tabel is 'n gas by kamertemperatuur?
4.2 Definieer die term homoloë reeks - NSC Physical Sciences - Question 4 - 2016 - Paper 2
Step 1
Watter verbinding in die tabel is 'n gas by kamertemperatuur?
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Answer
Die verbinding wat 'n gas by kamertemperatuur is, isButaan, wat 'n kookpunt van -1 °C het.
Step 2
Definieer die term homoloë reeks.
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Answer
‘n Homoloë reeks is 'n groep organiese verbindings met dieselfde funksionele groep waar een lid verskil van die volgende lid deur 'n CH₂ groep.
Step 3
In Type Van der Waalskrag word tussen molekules van verbindings A en ook tussen molekules van B, C, D en E gewind. Skryf die naam van die Van der Waalskrag neer.
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Answer
Die naam van die Van der Waalskrag tussen molekules van verbindings A is 'n London-kragtige.
Step 4
In A there are London forces / dispersion forces.
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Answer
In B there are dipole-dipole forces in addition to London forces. Intermolekulêre kragte in B is sterker as in A.
Step 5
Both C and D have hydrogen bonds.
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Answer
Die waterstofbindings in B is sterker as in C omdat D meer sitte vir intermolekulêre aantrekkingskragte het.
Step 6
D’ (Butanoic acid/Butanoësuur) has a longer carbon chain than D, thus making it have a higher boiling point.
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Die langer koolstofketting in Butanoësuur maak dat dit 'n hoër kookpunt het in vergelyking met D.
Step 7
Verwys na molekulêre struktuur, tipe en sterkte van intermolekulêre kragte in vraag 4.5.2.
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In hierdie opsig sal die molekulêre struktuur en die sterkte van die intermolekulêre kragte bespreek word, wat die verskillende kookpunte van die verbindings kan verduidelik.
