# The Laws Of Thermodynamics Discussion

The Laws Of Thermodynamics Discussion
The Laws Of Thermodynamics Discussion
1. Which gas has the greatest average kinetic energy?
(A) A
(B) B
(Qee
(D) The same in all three containers
2. Which container contains the gas molecules moving at the greatest speed?
(A) A
(B) B
Orie
(D) The same in all three containers
3. The temperature of container A is lowered to 100 K. Which of the
following will not occur to the gas in the container? Assume the container
is rigid.
(A) The volume of the gas will decrease.
(B) ‘The pressure of the gas will decrease.
(C) The speed of the particles will decrease.
(D) The kinetic energy of the particles will decrease.
Questions 317 and 318 refer to the dissolution process described below.
Dissolving an ionic solid in water is a multistep process in which three distinct
processes must occur. The three steps are:
1. The separation of ions in the solid
2. The separation of particles in the solvent (water)
3. The formation of ion-dipole interactions between the ions and the water
molecules
317. What is the AH of each step?
(A) All of the steps are either endothermic or exothermic, depending on
the AH of solution of the solute/solvent pair.
(B) Steps 1 and 2 are endothermic and step 3 is exothermic.
(C) Steps 1 and 2 are exothermic and step 3 is endothermic.
(D) Steps 1 and 2 are either both endothermic or both exothermic, depending on the solute and solvent, but step 3 is always the
opposite.
Energy NaCl () AH? = —411 kj
The elements Na and Cl react directly to form NaCl according the equation above.
Refer to the equation above and the table below to answer the questions that follow.
AH®
Process (kJ)
Na (s) > Na @ v
Na (g) > Na* (g)

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