A sample of hydrogen gas occupies a volume of 22.0 mL at STP. What will be the new pressure (in mmHg) when the temperature changes to 45.0oC and the volume expands to occupy 34.8 mL? ______________________ mmHg
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.
1. A sample of hydrogen gas occupies a volume of 22.0 mL at STP. What will be the new pressure (in mmHg) when the temperature changes to 45.0oC and the volume expands to occupy 34.8 mL?
______________________ mmHg
2. A sample of O2 gas initially occupies a volume of 314 mL at 57.0oC and 1.97 atmospheres.
What volume will it occupy when the pressure changes to 872.0 torr while the temperature remains constant? Report your answer in mL with three significant figures
______________ mL
If the before and after temperature had been 100.0oC instead of 57.0oC what would be the volume? Everything else being the same. Report your answer in mL with three significant figures
______________ mL
Trending now
This is a popular solution!
Step by step
Solved in 4 steps with 4 images
