a) The third law of thermodynamics relates the entropy (randomness) of matter to its absolute temperature. Which of the following statements are in agreement with the third law of thermodynamics? Check all that apply. In a gaseous state, the entropy of the system is zero. At zero degrees kelvin, substances maximize entropy. As the temperature of a perfect crystal increases, the random vibrations of the molecules decrease. In a crystalline state, there is a tendency to minimize entropy.
a) The third law of thermodynamics relates the entropy (randomness) of matter to its absolute temperature. Which of the following statements are in agreement with the third law of thermodynamics? Check all that apply. In a gaseous state, the entropy of the system is zero. At zero degrees kelvin, substances maximize entropy. As the temperature of a perfect crystal increases, the random vibrations of the molecules decrease. In a crystalline state, there is a tendency to minimize entropy.
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter16: Thermodynamics: Directionality Of Chemical Reactions
Section: Chapter Questions
Problem 93QRT: The standard molar entropy of iodine vapor, I2(g), is 260.7 J Kl mol-1 and the standard molar...
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a) The third law of thermodynamics relates the entropy (randomness) of matter to its absolute temperature. Which of the following statements are in agreement with the third law of thermodynamics?
Check all that apply.
| In a gaseous state, the entropy of the system is zero. |
| At zero degrees kelvin, substances maximize entropy. |
| As the temperature of a perfect crystal increases, the random vibrations of the molecules decrease. |
| In a crystalline state, there is a tendency to minimize entropy. |
| At the melting point, the entropy of a system increases abruptly as the compound transforms into a liquid. |
| At absolute zero, the interatomic distance within a crystal is minimized. |
b) Calculate the standard-state entropy for the following reaction:
1 CH4(g)CH4(g) ++ 2 O2(g)O2(g) ⟶⟶ 1 CO2(g)CO2(g) ++ 2 H2O(l)
Standard-state entholpy
| Formula | S∘ J/(K⋅mol)J/(K⋅mol) |
| CO2(g)CO2(g) | 214 |
| H2O(l)H2O(l) | 189 |
| CH4(g)CH4(g) | 186 |
| O2(g)O2(g) | 205 |
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