All alloys are made up of different metals and have metallic properties. A mixture, on the other hand, is a substance that is made up of a combination of other substances where no chemical reaction occurs between the substances. ... If the mixture is a mix of various metallic elements, then the mixture is an alloy.
Increased temperature causes an increase in kinetic energy. The higher kinetic energy causes more motion in the gas molecules which break intermolecular bonds and escape from solution.
