Final answer:
Two examples of materials for which the C might be readily available but for which the Cm would not are graphite and glass.
Step-by-step explanation:
Graphite and glass are two examples of materials for which the C might be easily obtained but the Cm would not.
A type of carbon with a layered structure that makes it easy to extract and obtain is called graphite. Graphite does, however, have a comparatively low Cm (molar heat capacity) when compared to other materials, which means that less heat is needed to raise its temperature.
Materials that are easily accessible, like sand, soda ash, and limestone, are used to make glass. Glass has a relatively high specific heat capacity (C), but its molar heat capacity (Cm) varies according to its composition and type.