Chemistry Middle School

List the five physical phase changes of matter and give one example for each.

Answers

Answer 1

Answer:Melting.

Freezing.

Evaporation.

Condensation.

Sublimation.

Explanation:

Answer 2

Answer: Examples for the five transformations previously given.

For the first four, we encounter common examples in everyday life, all to do with water:

Freezing - liquid to solid, e.g. water to ice, e.g. making ice cubes.

Melting - solid to liquid, e.g. ice to liquid water, melting ice cubes or snow flakes.

Condensation - gas to liquid, e.g. water vapor (gas) to liquid -  water vapor in air (humidity) condenses to form liquid droplets on the outside of a cold beverage glass on a hot humid day; or cloud formation  in the atmosphere.

Evaporation - liquid to gas, e.g. liquid water on clothes evaporates as clothes dry on clothesline or in dryer

While water can sublime under certain conditions of temperature and pressure, it is less evident in everyday life.  Carbon dioxide however is a more common example.

Sublimation - solid to gas, e.g. "dry ice" disappearing. The visible smoke associated with dry ice is most likely just condensing water vapor in the air as the solid carbon dioxide cools the air.

Explanation:

Related Questions

PLEASE HELP QUARTER TWO IS ALMOST OVER AND I HAVE TO TURN THIS IN TODAY!!!

Answers

Answer:

5. Sensory transduction is the translation of the sensory stimulus into neuronal activity.  It involves a variety of physical and chemical mechanisms.

6. The central nervous system is made up of the brain and spinal cord. The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.

7. The peripheral nervous system refers to parts of the nervous system outside the brain and spinal cord. It includes the cranial nerves, spinal nerves and their roots and branches, peripheral nerves, and neuromuscular junctions.

8. When a pin is poked in the finger the signals are received by the sensory neurons and it is sent to the brain via the spinal cord. The signals are processed (for removal of the hand) and sent toward the muscles by the motor neuron.

What has compounded the tremendous increase in human population in the last few decades? Select all that apply.
agriculture
houses
technology
tools

Answers

Answer:

technology

Explanation:

because people will go to placed with more technology

Technology
Because technology has influenced our way of thinking and understanding

What is the number above each symbol in the periodic table?
A.atomic number
B. chemical symbol
C.atomic mass
D.none of the above

Answers

A. Atomic Number is the answer.

Answer:

atomic number

Explanation:

there are 118 elements. Some tables includes on the right side of the symbol is the atomic mass.

Hope this help. :)

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