Chemistry Unit 3 Test

Front 1

1. fixed volume; variable shape
2. fixed volume; fixed shape
3. variable volume; variable shape

Back 1

2 Solid
1 Liquid
3 Gas

Front 2

The state of water is determined solely by the conditions of pressure and temperature.

Back 2

True

Front 3

If temperature is held constant for an ideal gas, as P and V change for a given gas sample, the PV products will be constant.

Back 3

True

Front 4

Back 4

Front 5

What is the primary cause of diffusion?

Back 5

random internal motion of atoms and molecules

Front 6

Which molecules shown on the graph above are likely candidates for evaporation?

Back 6

molecules under the right end of the curve

Front 7

What is the approximate vapor pressure when the gas condenses at 80°C?

Back 7

430

Front 8

How is condensation explained by the Kinetic Molecular Theory?

Back 8

Cooling reduces particle motion, resulting in coalescence by attractive forces.

Front 9

At what approximate temperature and pressure can all three phases of water exist simultaneously?

Back 9

0°C, 5 mmHg

Front 10

In order for a high temperature boiler or steam engine to produce superheated steam:

Back 10

The system must be pressurized.

Front 11

The dashed segment of the plotted experiment is called:

Back 11

extrapolation

Front 12

The temperature at the point of intercept of the plotted data with the Temperature axis is:

Back 12

-273°C

Front 13

Each degree on the Kelvin scale equals:

Back 13

1°C

Front 14

In the reaction 2NaCl + 2H2O → 2NaOH + Cl2 + H2, the reactants should:

Back 14

weigh the same as the products

Front 15

When the substance in the diagram is heated to "T2," what has happened?

Back 15

The average kinetic energy has increased.
More molecules have a higher energy level.

Front 16

Which phase change temperatures are identical on the phase diagram? Select all that apply.

Back 16

freezing point - melting point
boiling point - condensation point

Front 17

The spontaneous intermingling of atoms among different substances is accomplished by diffusion.

Back 17

True

Front 18

Temperature is inversely related to the average kinetic energy of a gas.

Back 18

False

Front 19

The reduced vapor pressure at high altitudes causes a liquid to boil at a higher temperature.

Back 19

False

Front 20

Water freezes at ___ K.

Back 20

273

Front 21

10.0 liters of oxygen are contained in a diver's tank at 20.0°C and 2.0 atm pressure. What is the pressure when the tank is left exposed to the sun and it is heated to 45°C?

Back 21

2.2 atm

Front 22

___ BCl3 + ___ H2O → ___H3BO3 + ___HCl

Back 22

blank - 3 - blank - 3

Front 23

___C3H8 + ___O2 → ___CO2 + ___H2O

Back 23

blank - 5 - 3 - 4