The liquefaction of chlorine gas at 35 degrees Celsius under normal pressure is a physical change. It involves a change in the state of the substance (from gas to liquid) without altering its chemical composition.
This is a chemical change. When sodium reacts with water, it undergoes a chemical reaction to produce hydrogen gas and sodium hydroxide. The formation of new substances (sodium hydroxide) and the evolution of gas (hydrogen) indicate a chemical change rather than a physical one.
No, the release of energy when sodium metal reacts with chlorine gas is a chemical property, not a physical property. Chemical properties involve changes in the chemical composition of a substance, while physical properties are characteristics that can be observed without changing the substance's composition.
Making ammonia from nitrogen and hydrogen is a chemical change because it involves a rearrangement of the atoms in the reactants to form new chemical compounds in the product (ammonia). This process is characterized by the breaking and forming of chemical bonds.
Catalase breaks down hydrogen peroxide into water and oxygen. Catalase is found in blood and bacteria in the wound. The bubbles you see are from the oxygen that is being released.
chemical
When hydrogen burns in chlorine gas, it undergoes a chemical change. This is because new substances are formed as a result of the reaction, such as hydrogen chloride. The properties of the starting materials are different from those of the products.
chemical
this is a chemical change.
This is a chemical change.
The process of chlorine gas becoming a liquid is a physical change, as the substance's molecular arrangement remains the same. This change is reversible and does not involve a chemical reaction.
Easy, chemical change.
chemical change
It is a chemical change ....
This is a chemical change.
Reacting violently with chlorine is a chemical property because it describes how a substance undergoes a chemical change when coming in contact with another substance, in this case, chlorine.
The observation that hydrogen chloride is a gas at room temperature is a PHYSICAL property.