Answer :
Extra heat would be absorbed by the wall during the day when the sun is out, then released back into the space at night when the sun sets.
Atoms join together to form covalent compounds by sharing electrons. These substances have low melting and boiling points because their weak attraction forces cause them to heat very quickly. The most crucial characteristic of covalent compounds is therefore that the wall would collect excess heat during the day when the sun is out, then release the heat back into the room at night. This property allows paraffin wax to assist maintain a room's temperature level.
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