A syringe contains a sample of air at room temperature and pressure. Assuming no leaks in the syringe and no change in temperature, when the volume of the syringe is decreased from 30 mL to 10 mL, the gas pressure in the syringe will -- A. increase by a factor of 3 B.increase, but not by a factor of 3 C.decrease by a factor of 3 D. decrease, but not by a factor of 3 E. not change . An Erlenmeyer flask contains a sample of air at room temperature and pressure. Assuming the flask does not leak, when the temperature of the flask is increased from 25 oC to 50 oC, the gas pressure within the flask will-- A. increase by a factor of 2 B. increase, but not by a factor of 2 C. decrease by a factor of 2 D. decrease, but not by a factor of 2 E. not change A balloon contains a sample of air at 1.00 atm and 10 oC. Assuming the balloon does not leak, when the temperature of the balloon is increased from 10 oC to 40 oC at constant pressure, the volume of the balloon will -- A.increase by a factor of 4 B. increase, but not by a factor of 4 C. decrease by a factor of 4 D. decrease, but not by a factor of 4 E. not change
Ideal and Real Gases
Ideal gases obey conditions of the general gas laws under all states of pressure and temperature. Ideal gases are also named perfect gases. The attributes of ideal gases are as follows,
Gas Laws
Gas laws describe the ways in which volume, temperature, pressure, and other conditions correlate when matter is in a gaseous state. The very first observations about the physical properties of gases was made by Robert Boyle in 1662. Later discoveries were made by Charles, Gay-Lussac, Avogadro, and others. Eventually, these observations were combined to produce the ideal gas law.
Gaseous State
It is well known that matter exists in different forms in our surroundings. There are five known states of matter, such as solids, gases, liquids, plasma and Bose-Einstein condensate. The last two are known newly in the recent days. Thus, the detailed forms of matter studied are solids, gases and liquids. The best example of a substance that is present in different states is water. It is solid ice, gaseous vapor or steam and liquid water depending on the temperature and pressure conditions. This is due to the difference in the intermolecular forces and distances. The occurrence of three different phases is due to the difference in the two major forces, the force which tends to tightly hold molecules i.e., forces of attraction and the disruptive forces obtained from the thermal energy of molecules.
A syringe contains a sample of air at room temperature and pressure. Assuming no leaks in the syringe and no change in temperature, when the volume of the syringe is decreased from 30 mL to 10 mL, the gas pressure in the syringe will --
A. increase by a factor of 3
B.increase, but not by a factor of 3
C.decrease by a factor of 3
D. decrease, but not by a factor of 3
E. not change .
An Erlenmeyer flask contains a sample of air at room temperature and pressure. Assuming the flask does not leak, when the temperature of the flask is increased from 25 oC to 50 oC, the gas pressure within the flask will--
A. increase by a factor of 2
B. increase, but not by a factor of 2
C. decrease by a factor of 2
D. decrease, but not by a factor of 2
E. not change
A balloon contains a sample of air at 1.00 atm and 10 oC. Assuming the balloon does not leak, when the temperature of the balloon is increased from 10 oC to 40 oC at constant pressure, the volume of the balloon will --
A.increase by a factor of 4
B. increase, but not by a factor of 4
C. decrease by a factor of 4
D. decrease, but not by a factor of 4
E. not change
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