review: gases packet

Review:

Gases Packet

WHICH LAW STATES: PV = NRT?

Ideal

WHAT VARIABLE IS HELD CONSTANT FOR CHARLES’

LAW?Pressure (& # of particles)

WHAT DOES THE ”N” REPRESENT IN THE

FOLLOWING LAW: PV = NRT?

# of moles

DESCRIBE PARTICLE MOTION OF A GAS.

Motion – continuous, random motion

WHO’S LAW STATES: P1V1 = P2V2?

Boyle’s

WHAT HAPPENS AT ABSOLUTE ZERO?

All molecular motion stops

DESCRIBE THE VOLUME OF GASES.

Volume – NOT definite

WHO’S LAW CAN BE USED TO EXTRAPOLATE ABSOLUTE

ZERO?Charles’ law

USING THE KMT, EXPLAIN WHAT HAPPENS TO THE PRESSURE OF

A GAS WHEN THE VOLUME DECREASES?

As volume decreases, gas particles have more collision w/ container walls, therefore causing a HIGHER pressure

WHY CAN GASES BE COMPRESSED WHILE SOLIDS

CANNOT?B/c gases have A LOT of space between particles to be pushed together while solids DO NOT have a lot of space between particles

_______ IS WHERE GAS PARTICLES CAN PASS THROUGH TINY

OPENINGS

Effusion

AT WHAT TEMPERATURE DOES ABSOLUTE ZERO

OCCUR?0 K or -273C

EXPLAIN WHAT HAPPENS TO THE VOLUME OF A GAS WHEN THE TEMPERATURE INCREASES AND PRESSURE IS CONSTANT? As temp. increases, volume increases!

WHO’S LAW STATES: V1_ = V2__ ? T1 T2

Charles’ Law

WHO’S LAW WOULD YOU USE IF A GAS WAS COLLECTED

OVER WATER?Dalton’s Law

WHICH LETTER REPRESENTS WHERE THE VACUUM IS?

B B

A

C

______ IS A GAS THAT DOES NOT BEHAVE ACCORDING TO KMT

Real Gas

WHO’S LAW STATES:

PDRY GAS = PTOTAL PWATER VAPOR ?Dalton’s Law of Partial Pressures

DEFINE BOYLE’S LAW.

Boyle’s = volume & pressure are INVERSELY proportional @ constant temp.

WHAT DOES A BAROMETER MEASURE?

Atmospheric pressure

WHAT CAUSES A GAS TO EXERT PRESSURE?

Collisions with any surface (more collisions = more pressure)

LIST 2 WAYS ATMOSPHERIC PRESSURE CAN BE

AFFECTED?

WeatherElevation

WHAT GAS LAW IS REPRESENTED BY THE FOLLOWING GRAPH?

Charles’ Law

Graph A

HOW CAN THE HEIGHT OF THE HG BE USED TO MEASURE

ATMOSPHERIC PRESSURE IN A HG BAROMETER?

The pressure of the atmosphere is directly proportional to the height of Hg in the column

WHAT VARIABLE IS HELD CONSTANT FOR BOYLE’S

LAW?Temperature (& # of particles)

WHAT LAW STATES: _P1V1 = _P2V2 ? T1 T2

Combined Gas Law

WHAT ARE 2 CAUSES OF NON-IDEAL BEHAVIOR OF

GASES?

HIGH pressuresLOW temperatures

Both force gas particles to have a lot of IM forces

WHAT FORCE IS PULLING DOWN ON THE COLUMN OF

MERCURY IN A BAROMETER? Gravity

_______ IS AN IMAGINARY GAS THAT CONFORMS TO KMT

Ideal Gas

IF THE VOLUME OF A GAS IS DOUBLED, WHAT HAPPENS TO THE

PRESSURE AT A CONSTANT TEMPERATURE?

Pressure is HALVED!

DESCRIBE PARTICLE SPACING OF A GAS.

Spacing – very far apart

WHAT WILL HAPPEN TO THE COLUMN OF MERCURY, IF ATMOSPHERIC PRESSURE

DECREASES? DECREASES!!

WHAT GAS LAW IS REPRESENTED BY THE FOLLOWING GRAPH?

Boyle’s LawGraph B

DESCRIBE THE SHAPE OF GASES.

Shape – NOT definite

_______ IS THE SPONTANEOUS MIXING OF PARTICLES

Diffusion

IF THE TEMPERATURE OF A GAS IS TRIPLED, WHAT HAPPENS TO THE

VOLUME AT A CONSTANT PRESSURE?

Volume is tripled

WHICH GAS (IDEAL OR REAL) IS USED IN THE STUDY OF

THE DIFFERENT GAS LAWS? IDEAL!

DEFINE CHARLES’ LAW.

Charles’ = volume & temp. are DIRECTLY PROPORTIONAL @ constant pressure

AT A CONSTANT TEMPERATURE, IF VOLUME IS HALVED, WHAT HAPPENS TO

PRESSURE?Pressure doubles