Question

When a solution is mixed, the following observations were made:

I. The mass of the solution remained the same.

II. Phase changes were observed.

III. The color of the solution remained clear.

IV. The temperature of the solution increased.

Which observation is a sign that a chemical change has occurred?

Answer 1

IV. the temperature of the solution increased

Step-by-step explanation:

all chemical change is either exothermic or endothrrmic, temperature is a sign of an exothermic reaction (pretty sure)