Question #1fa63

Question

Question #1fa63

1 Answer

Impact of this question

1814 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-05-15T14:04:19

A chemical change is a change in the composition of atoms that make up a compound, or element, A physical change is a change in the state of the compound or element with no change in composition.

Explanation:

A chemical change like the formation of water has a change in the composition of the atoms.

$2 H_{2} + 1 O_{2} = = = = 2 H_{2} O$ $2 H_2 + 1 O_2 ==== 2 H_2O$

The diatomic molecules of the elements Oxygen and Hydrogen have been changed into a triatomic Compound of Water
This is a chemical change.

A physical change like the evaporation of water has a change in the physical state of the compound

$H_{2} O (l) + h e a t = = = H_{2} O (g)$ $H_2O(l) + heat=== H_2O(g)$

This is a physical change because the chemical composition of the water has not changed. but it has changed state from a liquid to a solid.

A chemical change is the formation of salt sodium chloride

$2 N a (s) + 1 C l_{2} (g) = = = 2 N a^{+} C l^{-}$ $2 Na(s) + 1 Cl_2(g) === 2 Na^+Cl^-$

This is a chemical change because the two dangerous elements have become a beneficial compound salt.

A physical change is the formation of salt water.

$N a^{+} C l^{- (s)} + H_{2} O = = N a^{+} (a q) + C l^{-}_(a q))$ $Na^+Cl^-(s) + H_2O == Na^+(aq) + Cl^-_(aq))$

Science

Math

Humanities

... and beyond

Question #1fa63

1 Answer

Explanation:

Related questions

Impact of this question