← Bonding, structure, properties and energy changes
How this connects to your other standards
This standard is not a sealed topic. Read this first if you are also taking one of the standards below.Related in other Level 2 Chemistry standards
The most direct links:
Properties of selected organic compounds (91165): the same IMF reasoning, applied to organic molecules Predicting boiling points and solubility in organic chemistry (why an alcohol dissolves in water but a long hydrocarbon chain does not) uses exactly the polarity/IMF-strength argument built here — only the specific molecules change. Rates of reaction and equilibrium (91166): energy diagrams reappear with activation energy front and centre The enthalpy diagrams drawn here (reactants, products, ΔrH) are the same diagrams that standard adds a catalyst's effect on activation energy to — the axes and the shape-reading skill transfer directly. ✓The big picture in one sentence
Every "explain" or "justify" part in this paper wants the same shape: name the structure and bonding first, THEN link it explicitly to the observed property — never the property stated alone.Symbols that mean something different across chemistry standards
- ΔrH means the SAME thing (enthalpy change of reaction) in both this standard and chem-91166, but chem-91166 adds ΔG and K as new symbols built on top of it.
- M means molar mass here, but is also used for "molarity" (mol/L) in solution-concentration contexts elsewhere in chemistry — always check units to tell which meaning applies.