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STEM basic topics for Entrance Exam > Enhanced Chemistry > Flashcards

Enhanced Chemistry Flashcards

1
Q

Gas laws

A basic law in chemistry describing the behavior of gas held at a constant temperature.

Discovered in 1662

A

Boyle’s law

where volume is inversly proportional to pressure of gas .

P(1), V(1) = P(2), V(2)

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2
Q

Gas laws

The force exerted by gas against the walls of the container.

A

Pressure (P)

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3
Q

Gas laws

Determines the kinetic energy and rate of motion of the gas particles.

A

Temperature (T)

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4
Q

Gas laws

Where volume is directly proportional to the temperatue at constant pressure

By Jacques ________ (1746 - 1823)

A

Charles’ Law

V(1)/ T(1) = V(2)/ T(2)

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5
Q

Gas laws

(blank) Explains the laws that describe the behavior of gases.

A

Kinetic theory

Kinetic molecular theory of gases

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6
Q

Gas laws

The space occupied by the gas

A

Volume (v)

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7
Q

Gas laws

The quantity of has present in a container

A

Amount (n)

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8
Q

Gas laws

What is the formula for the combined gas law? where pressure, temperature, and volume is present.

A

(P1)(V1)/ T1 = (P2)(V2)/ T2

The combination of Boyle’s law, Charles’ LAw and Gay-iussac’s law

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9
Q

Gas laws

who’s number is this?
6.02 x 10^23

A

Avogadro’s law

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10
Q

Gas laws

It states taht the ratio of the product of pressure and volume and the absolte temperature of gas is equal to a constant

A

The combined gas law

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11
Q

Gas laws

Define the IDEAL GAS LAW

A

It is when Avogadro’s law is added into the combined gas law.

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12
Q

Gas laws

what is the equation for the ideal gas law?

A

PV=nRT

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13
Q

Gas laws

“Equal volumes of all gases, kept at the same pressure and temperature, contain the same number of molecules.”

A

The ideal gas law

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14
Q

A (Blank) is a group of 2 or more atoms, held together by chemical bonds, and can contain different elements.

A

A molecule

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15
Q

(blank) consists of 2 or more substances that are not chemically combined together.

A

A mixture

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16
Q

(blank) are substances that contains 2 or more different elements, held together by chemical bonds; are always found i the same proportions.

A

A compound

17
Q

what are the two types of mixtures?

A

Homogenous and heterogenous

18
Q

A composition or mixture that has non-uniform composition.

A

Heterogeneous mixture

19
Q

A composition that remains uniform throughout the entire sample.

A

Homogeneous mixture

20
Q

A mixture of 2 or more substances in the same phase

A

solution

21
Q

A substance that dissolves to form a solution

A

Solute

22
Q

A substance that dissolves a solute

A

Solvent

23
Q

Chemical reactions

Two ionic compounds exchange ions, resulting in the formation of two new compounds.

A

Double displacement

24
Q

Chemical reactions

The separation of a combined substance into multiple products

A

Decomposition reaction

25
Q

Chemical reactions

One element replaces another element in a compound

A

Single displacement

26
Q

Chemical reactions

Occurs when two or more substances combine and form a compound

A

Synthesis/combination reaction

27
Q

The speed of the reaction

A

Rate of reaction

Reactions take place when particles collide with a certain amount of energy.

28
Q

Rate of Reaction

The minimum amount of energy needed for the particles to react.

A

activation energy

29
Q

Rate of Reaction

is it effective or not? when colliding molecules posses a minimum kinetic energy to start a chemical reaction.

A

Effective

30
Q

Rate of Reaction

A way in which scientists explain how particles react.

particles eithe moves fast or slow depending on how much energy they have

A

The collision theory

31
Q

Rate of Reaction

is it effective or not? when the reactant molecules did not go in the correct orientation when they collide.

A

not

The reactant molecules should be in correct orientation when they collide.

32
Q

Rate of Reaction

what are the factors affecting the rate of reaction?

A

Temperature, surface area, concentration, prescence of a catalyst

STEM basic topics for Entrance Exam (7 decks)

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