Question

The energy store in a candle is the chemical energy in
the wax. The chemical energy is released when the
candle is burned. Not all types of wax used in candles
are the same.
Alina has two candles made from different types of wax,
Alina wants to find out which of the two types of wax
stores more energy.
She knows that she can burn the candles and use heat
from the flame to heat water.
Plan an investigation using this method to find out which of the two types of wax stores
more energy
Remember to make it a fair test in every way possible.​

Answer 1

Answer:

it is both chemical both physical change

Answer 2

Burning of candle  is considered as chemical reactions because it changes the chemical composition of these materials.

Explanation:

• • candle, which is a wax product is chemically a carbon compound and when it is burned in air the process is called as combustion.

• • In the process of combustion, the carbon compound ( candle) reacts with oxygen ( burning in air) carbon dioxide and water vapour is produced.

• • These process is not reversible which means that the products of the reaction cannot be formed back to reactants, also the chemical composition changes therefore, burning of candle is a chemical reaction.

To know more,

Is dissociation of iodine a physical change??​ - Brainly.in

brainly.in/question/18269375