UNIT 2 CONCEPT 3

Question 1

Temp

Answer 1

Temperature” means how hot or cold something is.

Question 2

plasma

Answer 2

“Plasma” is a hot gas where atoms are broken into charged particles.

Question 3

Bose-Einstein condensates

Answer 3

–A Bose-Einstein condensate is a state of matter formed when atoms are cooled to near absolute zero and act as one single particle.

Question 4

heat of fusion

Answer 4

Heat of fusion is the energy needed to change a solid into a liquid without changing its temperature.

Question 5

heat of vaporization

Answer 5

“Heat of fusion = energy to melt a solid.”

Question 6

vaperization

Answer 6

Vaporization is the process of changing a liquid into a gas.

Question 7

evaperation

Answer 7

Evaporation is the slow change of a liquid into a gas at the surface.

Question 8

boling

Answer 8

Boiling is the fast change of a liquid into a gas throughout the entire liquid.

Question 9

List the three principles of the kinetic moleculer thery

Answer 9

The three main principles of the Kinetic Molecular Theory are:

1. All matter is made of tiny particles (atoms or molecules).
2. These particles are in constant motion.
3. Collisions between particles are perfectly elastic (no energy is lost).

Question 10

explaine the diffrence between solids liquds and gasses include volume shape and partcal motion in your descrption

Answer 10

• Solids:
  • Shape: Definite (doesn’t change)
  • Volume: Definite (fixed)
  • Particle motion: Particles are tightly packed and only vibrate in place
• Liquids:
  • Shape: Takes the shape of the container (no definite shape)
  • Volume: Definite (fixed)
  • Particle motion: Particles move past each other but stay close
• Gases:
  • Shape: Takes the shape of the container (no definite shape)
  • Volume: No definite volume (fills the container)
  • Particle motion: Particles move fast and spread out freely

Question 11

in state change physical or chemical explaine how you know

Answer 11

• In a state change (like melting, freezing, boiling), the substance’s identity stays the same.
• Only its physical form (solid, liquid, gas) changes.
• No new substances are made, and the molecules don’t change their chemical structure.

For example, when ice melts into water, it’s still H₂O — just in a different state.

Question 12

draw the changing states of a matter diagram

Answer 12

Melting ↑
Solid ←────────→ Liquid
↓ Freezing

  Evaporation ↑ Liquid ←────────→ Gas
    ↓ Condensation

      Sublimation ↑ Solid  ←────────→ Gas
      ↓ Deposition Melting: Solid → Liquid

Freezing: Liquid → Solid

Evaporation: Liquid → Gas

Condensation: Gas → Liquid

Sublimation: Solid → Gas

Deposition: Gas → Solid

Question 13

sketce a simle heating curve and lable melting point boling point heat fusion heat vaperation soild gas and liqud gas

Answer 13

Melting ↑
Solid ←──────→ Liquid
↓ Freezing

  Evaporation ↑ Liquid ←──────→ Gas
    ↓ Condensation

    Sublimation ↑ Solid  ←──────→ Gas
    ↓ Deposition Definitions:

Melting: Solid → Liquid

Freezing: Liquid → Solid

Evaporation: Liquid → Gas

Condensation: Gas → Liquid

Sublimation: Solid → Gas

Deposition: Gas → Solid