Concept explainers
Interpretation:
To describe whether paper torned into several pieces is a physical change or not.
Concept Introduction:
In the physical property, the material or substance will not change its chemical identity only changes its physical state like solid into liquid or liquid into gas. For example changing in physical state like ice melts into water.
In the chemical property, the material or substance will change its chemical identity means there is a new substance formed by the formation heat, energy or gas. Like sodium readily reacts with water and farms another compound.
In the chemical change substance lose the identity while in the physical change substance does not lose the identity.
Interpretation:
To describe whether mixing of two clear solutions to produce a yellow solid is a physical change or not.
Concept Introduction:
In the physical property, the material or substance will not change its chemical identity only changes its physical state like solid into liquid or liquid into gas. For example changing in physical state like ice melts into water.
In the chemical property, the material or substance will change its chemical identity means there is a new substance formed by the formation heat, energy or gas. Like sodium readily reacts with water and farms another compound.
In the chemical change substance lose the identity while in the physical change substance does not lose the identity.
Interpretation:
To describe whether burning of match in air is a physical change or not.
Concept Introduction:
In the physical property, the material or substance will not change its chemical identity only changes its physical state like solid into liquid or liquid into gas. For example changing in physical state like ice melts into water.
In the chemical property, the material or substance will change its chemical identity means there is a new substance formed by the formation heat, energy or gas. Like sodium readily reacts with water and farms another compound.
In the chemical change substance lose the identity while in the physical change substance does not lose the identity.
Interpretation:
To describe whether dissolving of sugar in water is a physical change or not.
Concept Introduction:
In the physical property, the material or substance will not change its chemical identity only changes its physical state like solid into liquid or liquid into gas. For example changing in physical state like ice melts into water.
In the chemical property, the material or substance will change its chemical identity means there is a new substance formed by the formation heat, energy or gas. Like sodium readily reacts with water and farms another compound.
In the chemical change substance lose the identity while in the physical change substance does not lose the identity.
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Check out a sample textbook solutionChapter 3 Solutions
Introductory Chemistry: A Foundation
- Which among the following are physical changes? a blowing glass; b fermenting grapes; c forming a snowflake; d evaporating dry ice; e decomposing a substance by heating it.arrow_forwardClassify each of the following as (1) a physical property, (2) a physical change, (3) a chemical property, or (4) a chemical change. a. the process of burning a piece of newspaper b. the fact that metallic copper reacts with chlorine gas c. the process of melting ice d. the fact that metallic gold is a solid at room temperaturearrow_forwardClassify each of the following as a physical or chemical change, and give at least one observation, fact, or reason to support your answer. a. A stick is broken into two pieces. b. A candle burns. c. Rock salt is crushed by a hammer. d. Tree leaves change color in autumn.arrow_forward
- Classify each of the following as (1) a physical property, (2) a physical change, (3) a chemical property, or (4) a chemical change. a. the process of decomposing hydrogen peroxide b. the fact that a block of ice can be chipped into smaller pieces c. the process of evaporating a liquid d. the fact that water freezes at 32Farrow_forwardWhich of the following describes a chemical property? a. The density of iron is 7.87 g/cm3. b. A platinum wire glows red when heated. c. An iron bar rusts. d. Aluminum is a silver-colored metal.arrow_forwardIn each case, describe the change as a chemical or physical change. Give a reason for your choice. (a) A cup of household bleach changes the color of your favorite T-shirt from purple to pink. (b) The fuels in the space shuttle (hydrogen and oxygen) combine to give water and provide the energy to lift the shuttle into space. (c) An ice cube in your glass of lemonade melts.arrow_forward
- In each case, identify the italicized property as a physical or chemical property. Give a reason for your choice. The normal color of the element bromine is red-orange. Iron is transformed into rust in the presence of air and water. Dynamite can explode. Aluminum metal, the shiny “foil” you use in the kitchen, melts at 660 °C.arrow_forwardThe following are properties of substances. Decide whether each is a physical property or a chemical property. a Chlorine gas liquefies at 35C under normal pressure. b Hydrogen burns in chlorine gas. c Bromine melts at 7.2C. d Lithium is a soft, silvery-colored metal. e Iron rusts in an atmosphere of moist air.arrow_forwardWhich of the following are chemical changes? Which are physical changes? a. the cutting of food b. interaction of food with saliva and digestive enzymes c. proteins being broken down into amino acids d. complex sugars being broken down into simple sugars e. making maple syrup by heating maple sap to remove water through evaporation f. DNA unwindingarrow_forward
- Decide whether each of the following is a physical property or a chemical property of the substance. a Salt substitute, potassium chloride, dissolves in water. b Seashells, calcium carbonate, fizz when immersed in vinegar. c The gas hydrogen sulfide smells like rotten eggs. d Fine steel wool (Fe) can be burned in air. e Pure water freezes at 0C.arrow_forwardClassify each of the following as a physical or chemical change, and give at least one observation, fact, or reason to support your answer. a. A plum ripens. b. Water boils. c. A glass window breaks. d. Food is digested.arrow_forwardWhich of the following is a pure substance? (a) dry ice (solid CO2) (b) 9 K gold (c) dry air (d) bloodarrow_forward
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