No, not necessarily. An explosion might be be a sign of a chemical reaction (or a mechanical reaction, for that matter), since it's really just an enormous release of energy all at once.
Chemical reactions usually do exhibit some sort of observable change, though. For example, there may be a release or absorption of heat (in exothermic and endothermic reactions, respectively), a change in state of matter (solid, liquid, gas), or a change in color.
No, a chemical reaction does not have to give off a gas. Chemical reactions can produce various products including gases, liquids, or solids depending on the reactants involved and the conditions of the reaction.
An explosion may be the result of a chemical reaction. Such is the case if we set off a stick of TNT. But it may be nuclear, as in the case of a nuclear weapon, or may be mechanical, as in the case of the blast created when a compressed gas cylinder with a failing weld is filled and blows up. There can be several causes for an explosion.
not always but frequently there is. some chemicals when you mix them together are harmless but some can cause dangerous side affects. most of the time there will be some chemical reaction or change of colour when you mix chemicals. :)
No, they may merely result in an increase in temperature. As an example acetic acid in vinegar reacts with magnesium hydroxide in milk of magnesia. The reaction does release energy, which can be noted as the temperature of the solution increases noticeably, but the only visible change is that the solution turns from white to clear.
Yes, chemical reactions always involve chemical changes. The definition of a chemical reaction is a chemical change that takes place when combining two or more chemical substances. Of course, not every substance present for a reaction will necessarily undergo a chemical change: some may exit the reaction as the same material, even if their presence serves to catalyze the reaction.
No, the vast majority do not.
Yes.
The scientific word for a gas given off during a chemical reaction is "effluent".
No, oxidation is a chemical reaction that involves the loss of electrons from an atom or molecule. It does not give off oxygen as a byproduct.
The exothermic chemical reaction between lithium and water can be represented by the following equation: 2Li(s) + 2H₂O(l) → 2LiOH(aq) + H₂(g) + heat. This reaction produces lithium hydroxide, hydrogen gas, and heat energy.
Chemical changes always involve the absorption or release of energy. This can occur in the form of heat, light, or some other form of energy.
No, the moon does not give off light energy through a chemical reaction. The moon reflects the light from the Sun, creating the appearance of light. This process is known as lunar illumination.
The scientific word for a gas given off during a chemical reaction is "effluent".
but
It is sign of chemical reaction because smell and heat is produced.
As a result of a chemical reaction with gas release.
How could a chemist find out how much mass is given off as gas during a chemical reaction
substances can change to a solid, gas or liquid. solid - precipitate gas - fumes liquid - color change Either way, since its a chemical reaction, there always will be a change in the chemical composistion of a substance.
Effervescent, I believe.
Smell
A chemical change or reaction happens if new substances are formed. there may be a change in temperature so the reaction mixture may heat up or cool down. it also might change colour, give off bubbles of gas or fumes and you also might hear fizzing or a gas might explode.
The amount of mass given off as gas during a chemical reaction depends on the stoichiometry of the reaction and the molar mass of the gas produced. It can be calculated using the ideal gas law, which relates the pressure, volume, temperature, and number of moles of a gas.
Yes, it is possible: thermal decomposition and electrolysis.
The exothermic chemical reaction between lithium and water can be represented by the following equation: 2Li(s) + 2H₂O(l) → 2LiOH(aq) + H₂(g) + heat. This reaction produces lithium hydroxide, hydrogen gas, and heat energy.