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Vlada [557]
3 years ago
13

Which of the following observations would indicate that a material is a pure substance?

Chemistry
1 answer:
ELEN [110]3 years ago
5 0

Answer:

It does not dissolve in water. It changes color after heating, It cannot be physically broken down into different types of atoms.

Explanation:

hope that helps

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It means that 22.5×10^5 J of heat is required to change 1 kg of water into steam.

Latent heat of vaporization is amount of energy required to change 1 gram (in this example 1 kilogram) of material from the liquid to the gaseous state at its boiling point.

Boiling point of the water is 100°C.

Joule (J) is the standard unit for energy (in this example heat).

Evaporization is phase change process in which the water changes from a liquid to a gas (water vapor). Fore example, solar radiation can be the source of energy for evaporation.

More about heat of vaporization: brainly.com/question/14679329

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skelet666 [1.2K]

Answer:The law of conservation of mass states that in a chemical reaction mass is neither created nor destroyed. ... The carbon atom changes from a solid structure to a gas but its mass does not change. Similarly, the law of conservation of energy states that the amount of energy is neither created nor destroyed.

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