Hydrogen chloride dissolves in water. the chemical change is:

hcl (gas) → h (in water) + cl (in water)

this change releases a lot of heat to its surroundings.

what is true about the potential energy of hcl when it dissolves in water?

the potential energy of hcl (gas) is less than the potential energy of h (in water) and cl (in water).

the potential energy of hcl (gas) is equal to the potential energy of h (in water) and cl (in water).

the potential energy of hcl (gas) is greater than the potential energy of h (in water) and cl (in water).

there is not enough information to determine the potential energy of hcl (gas) and the potential energy of h (in water) and cl (in water).

The potential energy of HCl (gas) is less than the potential energy of H (in water) and Cl (in water).

Explanation:

Alright, lets get started.

Two sides of the rectange are 14 and s.

So, the area of the rectange would be =

So, the area of the rectange would be =

A triangle is cut from the rectangle.

The height of the triangle is =

The base of the triangle is = 14

So area of the triangle would be =

area of the triangle would be =

area of the triangle would be =

So, the area of shaded region = area of rectange - area of triangle

the area of shaded region =

As per given in question, area of shaded region is 84, hence

equation

So, this is the equation for s : Answer

Hope it will help :)