# the state changes of 0.5mol

the state changes of 0.5mol

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a)

An ideal gas is one which behaves according to the assumptions of the Kinetic Molecular Theory. In ideal gases it is assumed there are no forces of attraction between the particles that make up the gas; the volume occupied by the particles can be neglected; collisions between particles are perfectly elastic (they don't lose any energy when they collide). The paricles are assumed to move in constant, rapid, random straight line motion colliding with each other and the sides of their container.

Gases are affected by 4 factors: pressure, volume, temperature and number of particles. Because of this it has been agreed that results will be reported as though an experiment were conducted under a "standard" set of conditions. So, it doesn't matter if you conduct the experiment on a hot summer day, a cold winter night, or at a comfortable room temperature. The results will be corrected to reflect what would have been obtained at the "standard" temperature of 0 degrees celcius.

The "standard conditions" are:

pressure = 1.0 atmosphere (or 101.327 kilopascals)

temperature = 0.0 degrees celcius (or 273 Kelvins)

volume = 22.4 liters

number of particles is 1.0 mole

b)

pV = nRT

V = nRT/p

V = (1.00 mol)(0.0821 L atm/mol K)(273.15 K) / (1.00 atm)

Therefore: V = 22.4 L

0 °C (273.15K) and 1 atm pressure are referred to as conditions of:

Standard Temperature and Pressure (STP)

v = 2.52 m^3

c)

As a primitive weapon, there are no set dimension for a blowgun's length and diameter. However, generally there are several sizes:

Fukiya — diameter is 13 mm (.51 cal) in Japan. Tournament length is 120.0 cm, but for practice one can use a 50 cm tube. No mouthpiece is used; users wrap their lips around the tube. International versions can be slightly more flexible, allowing a tube of 121.92 cm (4 ft) and .50 cal under IFA rules. Darts consist of a paper cone 20 cm long, weighing 0.8 gram.

h=26cm

p= 76 cm Hg