Question

a granular substance is added to a liquid. which of the following would provide evidence to suggest a chemical change has taken place? the granules dissolve completely. the volume of the liquid increases. the liquid gives off heat. the granules seem to get smaller.

Explanation:

A chemical change involves the formation of new substances and often shows signs like heat release (exothermic reaction). Dissolving (physical change), volume increase (physical, like mixing), and granules getting smaller (physical, like dissolution or grinding) don't confirm a chemical change. Heat - giving off is a strong indicator of a chemical reaction (e.g., many combustion or neutralization reactions are exothermic).

Answer:

The liquid gives off heat.