Why does temperature remain constant during a change of state?
The temperature remains constant during the change of state because the heat energy which is supplied to change the state of matter is used in breaking the intermolecular forces and other attractive forces. Hence the temperature remains constant as all the heat is used up and no external heat is released or absorbed.
What are the four states of matter in order of distance between particles?
There are four natural states of matter: Solids, liquids, gases and plasma. The fifth state is the man-made Bose-Einstein condensates. In a solid, particles are packed tightly together so they don’t move much.
What is the difference between a phase change and a temperature change?
The term change of phase means the same thing as the term change of state. The change of phase always occurs with a change of heat. However the temperature does not change. When we heat a solid, the energy supplied is used to increase the kinetic energy of its molecules, and thereby its temperature increases.
How does a change in energy affect phase changes?
Energy is required to change the phase of a substance, such as the energy to break the bonds between molecules in a block of ice so it may melt. During a phase change energy my be added or subtracted from a system, but the temperature will not change.
What doesn’t change in a chemical reaction?
A physical change, such as a state change or dissolving, does not create a new substance, but a chemical change does. In a chemical reaction, the atoms and molecules that interact with each other are called reactants. No new atoms are created, and no atoms are destroyed.
What can cause a chemical change in matter?
Chemical Change. Chemical changes occur when bonds are broken and/or formed between molecules or atoms. This means that one substance with a certain set of properties (such as melting point, color, taste, etc) is turned into a different substance with different properties.