The melting point of copper is 1084°c. how does the energy of the particles in a certain amount of liquid copper compare to the energy of the molecules in the same amount of liquid water? why?

Explanation:

As it is given that melting point of copper is . So, it means liquid state of copper will exist at a temperature greater than .

Whereas, it is known that liquid state of water exists at above zero degree celsius.

And, kinetic energy of the particles of a substance is directly related to the temperature as follows.

                    K.E =

Hence, more is the temperature of a substance more will be the kinetic energy of its molecules.

Therefore, temperature of liquid copper is more than the temperature of liquid water.

Thus, we can conclude that the energy of the particles in a certain amount of liquid copper is greater than the energy of the molecules in the same amount of liquid water.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e