Format Answer Sheet A
General Chemistry 2
Learning Activity Sheet 6
Phase Diagram of Water and Carbon Dioxide
Most Essential Learning Competency
Interpret the phase diagram of water and carbon dioxide. Objectives
Describe the components of a phase diagram.
Use phase diagrams of p...
Interpret the phase diagram of water and carbon dioxide.
Objectives
Describe the components of a phase diagram.
Use phase diagrams of pure substances to determine its phase at a given temperature and
pressure. Interpret the phase diagram of water and carbon dioxide.
Describe how changes in temperature and pressure can change the state of matter.
Activity 1. Elicit/Engage
Phase changes are transformations of matter from one physical state to another. They occur when
energy (usually in the form of heat) is added or removed from a substance. Recall the types of
phase changes.
A.
Fill-out the diagram w ith the correct types of phase changes that you know.
,B.
Concept Matching
Draw a line matching the word to its definition.
1. Condensation A. The state of matter without a shape or volume.
2. Deposition B. The transition of matter from one state to another.
3. Evaporation C. The change of the physical state of matter from gas to liquid. The opposite
of evaporation.
4. Freezing D. The state of matter with a set volume but no set shape.
5. Gas E. The amount of force per unit area.
6. Liquid F. The change of the physical state of matter from solid directly to gas.
The opposite of deposition.
7. Matter G. The change of the physical state of matter from gas directly to solid.
The opposite of sublimation.
8. Mass H. Anything that both occupies space and has mass.
9. Melting I. The amount of space an object occupies.
10. Phase J. Change Measure of increasing kinetic energy from solid to liquid to gas.
12. Plasma K. The state of matter with a set volume and a set shape.
13. Pressure L. The change of the physical state of matter from a liquid to gas. The
opposite of condensation.
14.Solid M. The amount of matter contained in an object.
15. Sublimation N. Highly ionized ( charged) gases that exist at high temperatures.
16. Temperature O. The change of the physical state of matter from solid to liquid. The
opposite of freezing.
17. Volume P. The change of the physical state of matter from liquid to solid. The opposite
, of melting.
C.
Answer the questions below.
1. During concerts, plays, theatre acts, and other stage performances, have you noticed those smoke-
like substances that would cover the stage? How can this effect be achieved using CO 2 or dry ice?
2.1. What does LPG stands for?
2.2. How can a gas be liquefied?
2.3. What conditions are needed to convert a gas into liquid?
D. Read the text and study the diagram below. Then complete the sentence that follows.
Because carbon dioxide cannot exist as a liquid at atmospheric pressure, the dry ice sublimes
and instantly produces a gas, condensing water vapour, and creating a thick white fog.
Liquefied petroleum gas or li qui d petroleum gas ( LPG or LP gas), al so ref erred to as simpl y propane
butane, or are flammab
l ei m xtures of hydrocarbon gases used fas lue i n heating app li ances, cooking
equipment , and vehicl es.
Some substances cannot exi st i n a certai n phase hence there are two sci entific concepts needed
enable tto hese substances to undergo phase change . Can you name these two concepts?
___________ _______
_
Therefore, high and low are needed to liquefy a gas.
Activity 2. Explore
Read the text in interpreting the phase diagram. Then, do what is asked for every step.
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