Averages for Havana in August. The month of August can be unbearably hot in Havana. Visitors at this time of year are often there for one purpose and that is to swim in the incredibly warm waters of the Gulf of Mexico. As the midday heat descends upon the Cuban capital city, Havana, everyone heads to the water or inside to keep cool.
A compound can have properties different from its constituents,  as a new substance is formed when the constituents are chemically  combined.  The constituents of a compound can be separated only by  chemical methods.     Mixtures    Mixtures are impure substances.
A compound is a substance in which atoms of different elements are chemically held to one another. A mixture is a substance made by combining two or more different materials in such a way that no chemical reaction occurs.A mixture can usually be separated back into its original components, a compound can not.  The difference is that a compound is a chemically combined  'mixture' (well defined, with one set of properties) and a mixture  is not chemically combined (in a non-defined, variable combination  of compounds and/or elements, all with its own properties:  kerosine/gasoline/naphta, moist/dry air).