Question

Which change is most likely to occur when a molecule of h2 and a molecule i2 collide with proper orientation and sufficient energy?

Answer 1

Answer: Formation of hydrogen iodide will occur.

Explanation:

When molecule of hydrogen gas $(H_2)$ and molecule of iodine gas $(I_2)$ collide with proper orientation and with sufficient amount of energy. This collision of the two different molecules of gases will result in the formation of hydrogen iodide.

The balanced chemical equation of the reaction will written as:

$H_2(g)+I_2(g)\righarrow 2HI(g)$

Answer 2

The answer to this question would be: chemical changes

When two elements collide, the can react if the structure of the atoms allows it to be combined into a bigger molecule and there is enough energy. In this case, the hydrogen(H2) collides with iodine(I2) would be able to create HI molecule. This change is called chemical changes since it changes the element into a different molecule.