Question

A student believes she is observing a chemical reaction when pure sugar is burned and caramelizes. How can the student tell that a chemical change has really occurred?
1. by comparing whether each is in the solid, liquid, or gas phase
2. by comparing their volumes
3. by comparing their masses
4. by comparing the solubility of each in water

Answer 1

Answer:

The solubility of a solute in a particular solvent is the maximum concentration that may be achieved under given conditions when the dissolution process is at equilibrium. Referring to the example of salt in water:

Explanation:

We will know that caramelizing sugar is a chemical change because it changes the sugar's color. A chemical change involves the forming of new substances from specific substances called reactants. Caramelizing sugar releases volatile chemicals that cause its caramel flavor.V = 4/3 πr^3

The melting points of crystalline solids cannot be categorized in as simple a fashion as boiling points. The distance between molecules in a crystal lattice is small and regular, with intermolecular forces serving to constrain the motion of the molecules more severely than in the liquid state.

(radius of sphere B)^3 / (radius of sphere A)^3

= 4^3 / 2^3

= 64/8

= 8

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