American’s Four United Republics: Discovery-Based Curriculum
New Page 2
Equal volumes of gases under identical temperature and pressure conditions will
contain equal numbers of particles (atoms, ion, molecules, electrons, etc.).
At constant temperature, the volume of a confined gas is inversely proportional
to the pressure to which it is subjected.
The pressure of a mixture of gases is equal to the sum of the partial pressures
of the component gases.
A compound is composed of two or more elements chemically combined in a defined
ratio by weight.
Dulong & Petit's Law
Most metals require 6.2 cal of heat in order to raise the temperature of 1
gram-atomic mass of the metal by 1°C.
The weight of any element liberated during electrolysis is proportional to the
quantity of electricity passing through the cell and also to the equivalent
weight of the element.
First Law of
Conservation of Energy. The total energy of the universe is constant and is
neither created nor destroyed.
The ratio between the combining volumes of gases and the product (if gaseous)
can be expressed in small whole numbers.
The rate of diffusion or effusion of
a gas is inversely proportional to the square root of its molecular mass.
The solubility of a gas (unless it is highly soluble) is directly proportional
to the pressure applied to the gas.
Ideal Gas Law
The state of an ideal gas
is determined by its pressure, volume, and temperature according to the
PV = nRT
P is the absolute pressure
V is the volume of the vessel
n is the number of moles of gas
R is the ideal gas constant
T is the absolute temperature
When elements combine, they do so in the ratio of small whole numbers. The mass
of one element combines with a fixed mass of another element according to this
The chemical properties of the elements vary periodically according
to their atomic numbers.
Second Law of
Entropy increases over time. Another way of stating this law is to say that heat
cannot flow, on its own, from an area of cold to an area of hot.
America's Four United Republics Exhibit -
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