Are the following physical or chemical:
a. dew is dried by the sun
a dark cloth is faded by the sunlight
c. grape juice is converted to wine
d. soap is dissolved in water
a.physical
b.physical
c.chemical
d.chemical
Physical changes are those in which the substance is not changed. Chemical changes are those in which the substance is changed. For example, water boiling and turning into steam is a physical change. The water, in the liquid state, changed to vapor. It still is H2O. It changed states (liquid to vapor) but it did not change in composition. Now you go through your list. We shall be happy to check your answers if you wish.
a. physical
b.physical
c. chemical
d. chemical
Are the following physical or chemical:
a. dew is dried by the sun
a dark cloth is faded by the sunlight
c. grape juice is converted to wine
d. soap is dissolved in water
please explain why you think these are physical, physical, chemical, chemical.
a. Dew is dried by the sun is a physical change because the water is changing from a liquid to a gas, but the composition of the water remains the same.
b. A dark cloth is faded by the sunlight is a physical change because the color of the cloth is changing, but the composition of the cloth remains the same.
c. Grape juice is converted to wine is a chemical change because the composition of the grape juice is changed to form the wine.
d. Soap is dissolved in water is a chemical change because the soap molecules are breaking down and mixing with the water molecules to form a new solution.
a. Dew is dried by the sun - This is a physical change because the water in the dew evaporates due to the heat of the sun. The state of the water changes from liquid to gas, but the chemical composition of water remains the same (H2O).
b. A dark cloth is faded by the sunlight - This is also a physical change. Sunlight causes the pigments in the cloth to break down or lighten, altering the color. The change in appearance is physical, but the chemical composition of the cloth remains the same.
c. Grape juice is converted to wine - This is a chemical change. During the fermentation process, yeast converts the sugars in the grape juice into alcohol and carbon dioxide gas. The chemical composition of the grape juice changes, resulting in the formation of a new substance (wine).
d. Soap is dissolved in water - This is a physical change. When soap is dissolved in water, it forms a homogeneous mixture or solution. The soap molecules are dispersed within the water but do not undergo a chemical change. The chemical composition of both soap and water remains the same.
I apologize for the confusion. Let's go through each of the examples and explain why they are classified as physical or chemical changes:
a. Dew is dried by the sun - This is a physical change. Dew is formed when water vapor in the air condenses onto surfaces in the form of water droplets. When the sun dries the dew, it causes the water droplets to evaporate, changing from a liquid to a gas state. However, the composition of water remains the same, so it is considered a physical change.
b. A dark cloth is faded by sunlight - This is also a physical change. Sunlight can cause the color of a dark cloth to fade over time due to the breakdown of pigments. However, the composition of the cloth itself remains unchanged, so it is a physical change.
c. Grape juice is converted to wine - This is a chemical change. When grape juice ferments, yeast consumes the sugars in the juice and converts them into alcohol through a process called fermentation. This results in the formation of a new substance (alcohol) with different properties than the grape juice, making it a chemical change.
d. Soap is dissolved in water - This is a physical change. When soap is added to water, it dissolves and mixes with the water molecules. However, the chemical composition of the soap remains the same, and no new substances are formed. Therefore, it is a physical change.
So, the correct classifications are:
a. Physical
b. Physical
c. Chemical
d. Physical