Filll in with an answer from the following: 1) Assuming you have constant pressure and number moles, if you fill up a balloon with a certain volume of a gas at 445 K, when the volume is doubled, the temperature will _______________ (a)decrease by a factor 3 (b)increase by a factor of 4 (c)decrease by a factor of 2 (d)increase by a factor of 3 (e)increase by a factor of 2.
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.
Filll in with an answer from the following:
1) Assuming you have constant pressure and number moles, if you fill up a balloon with a certain volume of a gas at 445 K, when the volume is doubled, the temperature will _______________ (a)decrease by a factor 3
(b)increase by a factor of 4
(c)decrease by a factor of 2
(d)increase by a factor of 3
(e)increase by a factor of 2.
2) Which statement is true for the decomposition of 2NH3 (l) ⟶ N2 (g) + 3H2 (g) ___________ (ΔU & ΔE mean the same).
(a)ΔH is less than ΔU because of the pressure-volume work done by the gaseous products.
(b)ΔH is greater than ΔU because the pressure is constant.
(c)ΔH is greater than ΔU because of the pressure-volume work done by the gaseous products.
(d)ΔH is less than ΔU because the atmosphere does pressure-volume work done by the gaseous products.
(e)ΔH is equal ΔU because both are state functions.
3)Consider the following energy-level diagram for a particular electron in an atom (image attached) The following statement is incorrect: ________________.
(a) they are all incorrect.
(b) We would observe an electronjumping from level 2 to level 1 as a single line in a line spectrum.
(c) If the electron is in level 2, it may jump to level 1 by emmitting a photon with energy of |ΔU|.
(d) If the electron is in level 1, it may jump to level 2 by absorbing any photon having energy of at least |ΔU|.
(e) If the electron is in level 1, it may jump to level 2 by absorbing a photon with energy of |ΔU|.
4) The following configuration, [Ne]3s13p1, may represent _____________.
(a) an excited-state electron configuration of a Mg atom.
(b) a ground-state electron configuration of a Mg+ atom.
(c) a ground-state electron configuration of a Al+ atom.
(d) a ground-state electron configuration of a Na+ atom.
(e) an excited-state electron configuration of a Ne- anion.
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
