Which of these is a chemical property? color, compressibility, heat of combustion, malleability

Chemistry

2 answers:

skelet666 [1.2K]3 years ago

7 0

Answer: Heat of combustion

Explanation: Color is a physical property but however, color change can occur due to a chemical reaction. Example change in oxidation state of Fe(ii) to Fe(iii) from green to greenish brown.

2Fe²+ + 3O2 = 2Fe2O3

(Green) (Brown)

Compressibility is a physical property usually attributed to liquid, solid and gases. It is the change in volume or shape of matter and sometimes state of matter in gases.

Heat of combustion however is a chemical property because it is the heat change or given off as energy when an atom, molecule or compound is reacted with oxygen. Example when an organic substance undergoes combustion reaction with oxygen, it produces CO2, H2O and heat.

C6H12O6 + 6O2 = 6CO2 + 6H2O + Heat

(Oxidation reaction of glucose during respiration).

Malleability is a physical property because it is visible without altering the chemical composition of the material. For a material to be malleable, it means it can be hammered into thin sheet, rolled or capable of been flexible. Malleability is a unique physical property attributed to metals.

Flauer [41]3 years ago

6 0

Chemical changes only happen when the object changes form. Color is a physical property because you're not changing the object that you have, compressibility is also a physical property because you still have the same substance before and sfter, malleability again is another physical. Heat of combustion is physical, when you burn things it changes the substance. :)

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MrMuchimi

answer 1 :

Law of conservation of momentum states that

For two or more bodies in an isolated system acting upon each other, their total momentum remains constant unless an external force is applied. Therefore, momentum can neither be created nor destroyed.

answer 2: 

When a substance is provided energy in the form of heat, it's temperature increases. The extent of temperature increase is determined by the heat capacity of the substance. The larger the heat capacity of a substance, the more energy is required to raise its temperature.

When a substance undergoes a FIRST ORDER phase change, its temperature remains constant as long as the phase change remains incomplete. When ice at -10 degrees C is heated, its temperature rises until it reaches 0 degrees C. At that temperature, it starts melting and solid water is converted to liquid water. During this time, all the heat energy provided to the system is USED UP in the process of converting solid to the liquid. Only when all the solid is converted, is the heat used to raise the temperature of the liquid.

This is what results in the flat part of the freezing/melting of condensation/boiling curve. In this flat region, the heat capacity of the substance is infinite. This is the famous "divergence" of the heat capacity during a first order phase transition.

There are certain phase transitions where the heat capacity does not become infinitely large, such as the process of a non-magnetic substance becoming a magnetic substance (when cooled below the so-called Curie temperature).

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horrorfan [7]

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Explanation:

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vlada-n [284]

Answer:

wattter

Explanation: H20 jk lma++ooo

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