Answer: b
Explanation:
By adding heat you are adding more energy
Because more than one substance was released (following a color change signifying a chemical reaction), the sample was indeed, a compound.
The pressure will continue to build up eventually causing a release of pressure or an explosion.
Ions are electrically charged particles formed when atoms lose or gain electrons. They have the same electronic structures as noble gases. Metal atoms form positiveions, while non-metal atoms form negative ions. The strong electrostatic forces of attraction between oppositely charged ions are called ionic bonds.