# Phase Diagram Worksheet Name Basic Skills Packet Water Phase by BDe45hF

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Basic Skills Packet: Water
Phase Diagrams
For each of the questions on this worksheet, refer to the phase diagram for mysterious compound X.
1)     What is the critical temperature of compound X? ___________

2)     If you were to have a bottle containing compound X in your closet, what phase would it most likely be
in?
____________________________________

3)     At what temperature and pressure will all three phases coexist?

_____________________________________

4)     If I have a bottle of compound X at a pressure of 45 atm and temperature of 1000 C, what will happen if
I raise the temperature to 4000 C?

_____________________________________

5)     Why can’t compound X be boiled at a temperature of 2000 C?

_____________________________________

6)     If I wanted to, could I drink compound X?

_____________________________________
Refer to the phase diagram below when answering the questions on this worksheet:

1)     What is the normal melting point of this substance? ________

2)     What is the normal boiling point of this substance? ________

3)     What is the normal freezing point of this substance? ________

4)     If I had a quantity of this substance at a pressure of 1.25 atm and a temperature of 3000 C and lowered
the pressure to 0.25 atm, what phase transition(s) would occur?

5)     At what temperature do the gas and liquid phases become indistinguishable from each other?________

6)     If I had a quantity of this substance at a pressure of 0.75 atm and a temperature of -1000 C, what phase
change(s) would occur if I increased the temperature to 6000 C? At what temperature(s) would they
occur?
Answer each question in the space required.
On Crosbia, bolonium (Bg) and manasium (Ma) react together to form the compound tastegudum.
For each of the questions on this worksheet, refer to the phase diagram for tastegudum.

1) Label the regions of the diagram that correspond to the solid, liquid, and vapor phases. (Write the names of
these phases in the appropriate regions directly on the diagram.)
2) Draw a small red circle around the point that is the critical point for tastegudum.
3) Draw a small blue circle around the point that is the triple point for tastegudum.
4) What is the critical pressure, Tp, of tastegudum?
Ans: ______________________
5) What is the critical temperature, Tc, of tastegudum?
Ans: ______________________
6) At what temperature and pressure will all three phases of tastegudum coexist at equilibrium?
T = _____________ P = _____________

7) What is the boiling point temperature for tastegudum when the external pressure is 60 atmospheres?
Ans: ______________________
8) What is the freezing point temperature for tastegudum when the external pressure is 60 atmospheres?
Ans: ______________________

9) If you were to have a container containing tastegudum in your kitchen, in what state (phase of matter) would
10) A container of tastegudum is sitting at a pressure of 45 atmospheres and temperature of 100°C. Describe
what will happen as the temperature is raised by 400 °C.

11) A container of tastegudum is sitting at a temperature of 300 °C under 1 atmosphere of pressure. Describe
what will happen as the pressure is increased to 90 atmospheres.

12) Why can tastegudum not be brought to a boil at a temperature of 200 °C?

13) Assuming it is not poisonous; could tastegudum be used as a drink on earth? Explain your answer.

14) When skating on ice, one is actually skating on water. In reality, the weight of the skater is focused on a
very small area of ice by the narrow blade of the skate. This tremendous pressure causes the ice under pressure
to melt into water. By comparing the phase diagram for tastegudum with that of water, explain if tastegudum
would make a good skating surface, or not.
Polar Bonds

1. What is term used to describe an element that tends to pull electrons to itself very easily?

__________________________________________________________________________

2. What is meant by the term “polar bond”?

__________________________________________________________________________

3. For each of the following molecules tell whether they have polar or non-polar bonds:

a. F2_____________________                g. N2O3_____________________

b. FCl____________________                h. O2_______________________

c. CaF2___________________                i. CsCl______________________

d. N2O3 __________________                j. MgO _____________________

e. CO ____________________                k. CH4 ______________________

f. O2 _____________________               l. LiCl ______________________

4. Using the molecules from above along with this electronegativity chart, tell whether the bonds are
covalent, moderately polar, very polar, or ionic:

a.    F2_____________________          e. P2O3_____________________            j. CH4 ______________________

b.    FCl____________________          f. O2_______________________            k. LiCl ______________________

c.    CaF2___________________          g. CsCl______________________           l. MgO _____________________

d.    N2O3 __________________          h. O2 _____________________             m. CO _______________________
5. From the molecules below tell which elements are ionic or covalent:

a. F2_____________________                 g. P2O3_____________________

b. FCl____________________                 h. O2_______________________

c. CaF2___________________                 i. CsCl______________________

d. N2O3 __________________                 j. MgO _____________________

e. CO ____________________                 k. CH4 ______________________

f. O2 _____________________                l. LiCl ______________________

Polar Molecules

1) Define in your own words what the term dipole means?

____________________________________________________________________________________

____________________________________________________________________________________

2) If the polar bonds in a molecule are lined up linearly or in line, will that entire molecule be polar on non-

polar, why?

___________________________________________________________________________________

___________________________________________________________________________________

3) Define the two intermolecular forces and give an example where you would find each:

a. ______________________________________________________________________________

______________________________________________________________________________

b. ______________________________________________________________________________

______________________________________________________________________________

4) Why are water molecules as a whole polar whereas carbon dioxide molecules are non-polar?

____________________________________________________________________________________

____________________________________________________________________________________
5) Give three examples of compounds in which you would have hydrogen bonds.

a. __________________________

b. __________________________

c. __________________________

6) Why does bromine exist as a liquid at normal room temperature & pressure?

____________________________________________________________________________________

____________________________________________________________________________________

7) What state does iodine exist as at normal room temperature & pressure, why?

____________________________________________________________________________________

____________________________________________________________________________________

8) What state does sulfur exist as at normal room temperature & pressure, why?

____________________________________________________________________________________

____________________________________________________________________________________
Naming Covalent Compounds Worksheet
Write the formulas for the following covalent compounds:

1)    antimony tribromide __________________________________

2)    hexaboron silicide __________________________________

3)    chlorine dioxide __________________________________

4)    hydrogen iodide __________________________________

5)    iodine pentafluoride __________________________________

6)    dinitrogen trioxide __________________________________

7)    ammonia __________________________________

8)    phosphorus triiodide __________________________________

Write the names for the following covalent compounds:

9)    P4S5 __________________________________

10)   O2 __________________________________

11)   SeF6 __________________________________

12)   Si2Br6 __________________________________

13)   SCl4 __________________________________

14)   CH4 __________________________________

15)   B2Si __________________________________

16)   NF3 __________________________________

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