C2.3.2 - Changing State Flashcards
(25 cards)
What happens to the forces of attraction whenever something boils or melts?
They are overcome, and some or all of the bonds between its particles break
What could happen when a substance melts or boils?
It could become a liquid, or become a gas
What is the process of a solid turning into a liquid?
Melting
What is the process of a solid becoming a gas?
Sublimination
If the bonds in a substance are strong, will it take more or less energy to break them?
More
Give examples of the bonds that could break.
Intermolecular
Covalent
Ionic
Metallic
What do you know about a substance if its melting point is high?
It has got a lot of strong bonds
What do you know about a substance that has a low melting point?
It doesn’t have many strong bonds
What is transferred to the surroundings by heat when chemical bonds are formed?
Chemical stored energy
What happens to the bonds inside a substance when it condenses / freezes?
The bonds form again
What is the process of liquid turning into a solid?
Freezing
What is the process of a gas turning into a liquid?
Condensation
What are the bonds involved in the state changes of metals?
Metallic bonds
What is the relative strength of metallic bonds?
Strong
What are examples of metals?
Iron, Mercury
What are the bonds involved in state changes in an ionic compound?
Ionic bonds
What is the relative strength of ionic bonds?
Strong
What is an example of an ionic compound?
Sodium chloride
What are the bonds involved in state changes in giant covalent structures?
Covalent bonds
What is the relative strength for covalent bonds?
Strong
What are examples of giant covalent structures?
Diamond
Silica
What are the bonds involved in state changes in simple molecules?.
Intermolecular forces
What is the relative strength intermolecular forces?
Weak
What are examples of simple molecules?
Oxygen
Water
Wax
