Mixing sugar in a coffee is a physical change. Mixing sugar in coffee is a physical change because it does not form a new substance, it is still sugar and coffee. If you decided to mix sugar and water to make sugar water, the water could be left to evaporate and the sugar crystals would still be there. So mixing sugar in coffee is also very easy to reverse.
Mixing coffee with hot water is a physical change because the individual substances (coffee and water) retain their chemical identities and only the physical state of the coffee changes, dissolving in the water. No new substances are formed.
No, stirring milk into hot coffee is a physical change. The milk and coffee remain the same substances they were before mixing, only their physical state has changed.
Adding cold milk to hot coffee is a physical change because the milk and coffee retain their original chemical properties after mixing. The change in temperature is a physical property of the substances.
Mixing salt and water is a physical change, not a chemical change. The salt does not change its chemical composition when it dissolves in water, only its physical state.
A chemical change occurs when a new species is formed, and is generally not reversible. A physical change can usually be reversed as in the case of instant coffee. The coffee goes from a solid to a solution. Evaporation of the water would give the coffee back as a solid.
Mixing coffee with hot water is a physical change because the individual substances (coffee and water) retain their chemical identities and only the physical state of the coffee changes, dissolving in the water. No new substances are formed.
Mixing hot coffee with cold milk is a physical change because the molecules of both substances do not undergo a chemical reaction. The temperature change occurs due to heat transfer from the coffee to the milk, but the chemical composition of the coffee and milk remains the same.
Physical but especially also chemical because the instant coffee suffer a process of solubility in water.
No, stirring milk into hot coffee is a physical change. The milk and coffee remain the same substances they were before mixing, only their physical state has changed.
Adding cold milk to hot coffee is a physical change because the milk and coffee retain their original chemical properties after mixing. The change in temperature is a physical property of the substances.
no
Physical
It depends on what you are mixing it with.
it is a chemical change
physical :)
Mixing salt and water is a physical change, not a chemical change. The salt does not change its chemical composition when it dissolves in water, only its physical state.
both chemical and physical