29. A 275 mL sample of gas is kept at 25°C. What volume will the gas occupy at 100.°C? 30. A 575 mL sample of gas at STP is squeezed to a volume of 255 mL. What will be the pressure of this gas at 273 K? 31. What volume of H2 would be produced from the reaction of 225 grams of Zinc under conditions of 0.987 atm and 296 K? Given: Zn (s) + 2 HCI (aq) → H₂(g) + ZnCl₂ (aq) 32. What volume of H₂ would be produced from the reaction of 225 grams of Zinc reacting with 1.00 L of 2.20 M HCl, given the same temperature and pressure as #31? 33. Determine the molarity of a solution made by dissolving 52.1 grams of NaOH into 575 mL of solution. 34. What volume of 0.782 M HCl is needed to neutralize 29.1 grams of Al(OH)3? 3 HCI (aq) + Al(OH)3 (s) 3 H₂O (1) + AICI3 (aq) 35. What volume of 12 M HCl is needed to make 1.00 L of a 2.00 M HCI solution? Answers: 1. 3.1 g/mL 2. 0.12 kg 3. 302 K 4. Physical 5. Chemical 6. Homogeneous 7. Heterogeneous 8 47p+ 61n, 47e-
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.
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