Unit 6 Exam Review Questions

Review Question 1

• What’s the polarity?

NONPOLAR

Review Question 2

• What is the IMF (intermolecular force)

between these molecules?

LONDON DISPERSION

Review Question 3

• What is the most likely state of this molecules

at normal conditions of P and T?

GAS

Review Question 4

• What’s the polarity?

POLAR

Review Question 5

• What is the IMF (intermolecular force)

between these molecules?

HYDROGEN BONDING

Review Question 6

• What is the most likely state of this molecules

at normal conditions of P and T?

LIQUID

Review Question 7• What is the normal melting point?

273 K

Review Question 8• What is the normal boiling point?

373 K

Review Question 9• What’s the temperature and pressure of the

critical point?

647 K 647 K

and

374 atm

Review Question 10• What process or change is occurring?

FREEZING

Review Question 11• What process or change is occurring?

SUBLIMATION

Review Question 12

• What instrument is used to measure the

volume of a gas that is produced in a reaction?

EUDIOMETEREUDIOMETER

Review Question 13

• Is the graph below depicting a DIRECT

relationship or an INDIRECT relationship?

INDIRECT

INVERSE

• Which gas law is depicted in the graph above?

INVERSE

BOYLE’S LAW

Review Question 14

• What type of relationship is there between T

and V?

DIRECT

• Which gas law describes this relationship

between T and V?

DIRECT

CHARLES’ LAW

Review Question 15

• What are the conditions of STP (in °C and atm)?

0 °C 1 atm

• In K and torr?

273 K 760 torr

Review Question 16

• What affects the kinetic energy (motion) of

molecules?

TEMPERATURE

• What type of relationship exists between kinetic

energy and temperature?

DIRECT

Review Question 17

• Which droplet has molecules with the strongest

IMF?

• What is this property of liquids forming drops

based on IMF called?

• What is the most likely IMF affecting the

molecules in the drops in the figure on the right?

SURFACE TENSION

DIPOLE-DIPOLE or HYDROGEN BONDING

Review Question 18

• What type of solids do most ionic compounds

and covalent molecules form that have

repeating, geometric patterns like a lattice?

CRYSTALLINE

• What type of solids are blob or irregular shaped?

CRYSTALLINE

AMORPHOUS

Review Question 19

• Under what conditions do most ideal gases start

to become “real” or stop acting like gases?

HIGH PRESSURES and/or HIGH PRESSURES and/or

LOW TEMPERATURES

Review Question 20

• Kelvin temperature will never be this?

• What temperature will all molecules stop

NEGATIVE

• What temperature will all molecules stop

moving?

• What is this temperature called?

0 K or -273 °C

ABSOLUTE ZERO

Review Question 21

• What’s constant?

A balloon is filled to a volume of 3.0 L at a

temperature of 24 °C. What is the volume when

the balloon is put in a freezer where the the balloon is put in a freezer where the

temperature is -5 °C?

PRESSURE

Review Question 22

• If you wanted to see what happens to a gas in a

container with a movable piston (expandable

container) when you change the conditions, how

would you be able to do this?would you be able to do this?

USE THE COMBINED GAS LAW EQUATION

1 1 2 2

1 2

P V P V =

T T

Review Question 23

• There are 3 conversion factors (as well as a

balanced equation) you need for the following

problem:

H gas and O gas combined to form H O. If 5 g of H2 gas and O2 gas combined to form H2O. If 5 g of

H2 is available for reaction at STP, how many

liters of O2 is necessary?

• What are the 3 necessary conversion factors?

1) MM of H2

2) MR

3) MV

Review Question 24

• What is necessary to solve the following:

What volume of Cl2 gas would result 0.74 moles of

Cl2 is under 200 kPa of pressure at a temperature

of -10 °C?of -10 °C?

• Before using PV = nRT, what should you do first?

PV = nRT

1) Convert kPa ���� atm

2) Convert °C ���� K

Review Question 25

• Pressure is increased from 1 atm to 5 atm. What

will happen to volume? DECREASE

1 1 2 2

1 2

P V P V =

T T

will happen to volume?

• Is there anything you can do to INCREASE volume

while still increasing the pressure?

DECREASE

INCREASE TEMPERATURE

STUDY HARD FOR THE EXAM ON

FRIDAY!FRIDAY!

GOOD LUCK!