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What is the physical and chemical change that occurs when a birthday candle is lit on a cake?
There are multiple physical changes and chemical changes that occur when a candle burns. One physical change is that the candle melts back into liquid wax. One chemical change is flame burning on the wick.
What form of energy is being used as a candle burns?
The chemical energy stored in the candle wax.
Why burning candle is chemical change?
It is a chemical change because the burning thread is combusted. The combustion is an oxidation reaction. Most importantly, it is a chemical change because after burning, the chemical properties of the thread is changed entirely!
Can matter undergo a phyical and chemical change at the same time?
Yes, matter can undergo both physical and chemical changes simultaneously. For example, when a candle burns, the wax undergoes both a physical change (melting) and a chemical change (combustion) at the same time.
Why burning of candle is a physical and chemical change?
CHEMICAL
When a black soot formed as a candle burns is it a chemical change?
Yes. That is a chemical change.
When the wick burns and the candle melts is it a chemical or physical change?
it is a chemical change
when a candle is lit it undergoes a chemical change?
That is correct, a candle (or the material of which it is composed, which is usually paraffin) undergoes a chemical change when it burns.
A different chemical substance is formed when a piece of cloth is cut cup breaks candle burns or a piece of chalk breaks?
The candle burning is a chemical process.
What physical and chemical changes occur when a wax candle burn?
Some wax burns, and as it does so, chemical changes occurs. Wax converts to CO2, CO, and H2O. That is an exothermic reaction The rest of the wax melts with the increased temperature. That is the physical change.
Is burning candle getting shorter physical or chemical change?
Burning a candle is a chemical change because the wax undergoes a chemical reaction with oxygen in the air to form new substances like carbon dioxide and water. This process results in the candle getting shorter as it burns.
Why is melting of covered candle a physical change while burning of a candle wick a chemical change?
This is because a candle will change its whole form and stay that way, which is a physical outer change. And a candle wick only burns, it doesn't change it's appearance.
What gas is formed when a candle burns?
C02
Is a candle burns chemical reaction?
Yes, burning a candle is a chemical reaction. The easiest way to tell if something is a chemical reaction is if heat or light are given of, a new substance is formed, or a colour change happens. Chemical changes are irreversible.Yes, whenever a candle burns, it is a combustion reaction between the carbon compounds of the wick and wax of the candle and of oxygen in the air. These compounds burn to create carbon dioxide and water, and also a few smaller carbon compounds, which is evident as the smoke rising occasionally from the flame. The flame you see and the heat you feel rising off of the burning wick is the evidence of an exothermic chemical reaction.Yes, burning a candle is a chemical reaction. The easiest way to tell if something is a chemical reaction is if heat or light are given of, a new substance is formed, or a colour change happens. Chemical changes are irreversible.
Why are burning candle and rusting nails examples of chemical change?
Burning candles and the rusting of nails are examples of chemical changes owing to the fact that there are chemical reactions occurring and new chemical compounds are being formed as the reaction continues.When a candle burns, the wax and wick of the candle are undergoing combustion and (ideally) being chemically changed into carbon dioxide and water, which are two completely new chemical substances than were present in the candle. In the case of the nail, iron in the steel alloy from which the nail is made is combining with oxygen to form a chemical compound not present in the nail, namely iron oxide.
What is the rate at which a candle burns in millimeters per minute?
The rate at which a candle burns can vary, but on average, a candle burns at a rate of about 10 millimeters per minute. This rate can change depending on factors such as the size of the candle, its composition, and environmental conditions.
When a candle burns in air which change occurs first-physical or chemical?
chemical change occurs first. because first oxygen help in burning and form carbon-di-oxide which is a chemical change
